Yes, I used M$ operating systems. Note that I was born in 1960 so “growing up with” isn’t the same for me as you. But I didn’t just “grow up” with M$ but I also used on average four different OSs every month with over 50 hours for each including OS/2, Linux and Mac while also “trying” to use other OSs for as much as I could with me switching as time went on and some options died and others appeared.
At one point I had a spreadsheet of 50 operating systems noting everything that I personally did and what the OSs could do. I also kept track of speed, crashes, over 30 different things that I was interested in.
My FAVORITE OS all time is OS/2, second was the “ideas of BeOS” which plenty of people love and hence Haiku, then since 1998 it was more Classic Mac → Mac OS X → MacOS and my least favorite of all OSs I’ve ever tested is Windows for a LOT of reasons. I’ve used more than a dozen different distros of Linux trying to find one that didn’t irritate the heck out of me. I always had too many programs I was working on in different languages and different OSs to have time to “fiddle with Linux” as much as you have to. I personally like OSs where most of the things “just work” out of the box (so to speak).
One of the best, and in some cases the worst possible thing to ever happen was the internet. It made it too easy for viruses to spread. But at the same time we didn’t have to go to stores to buy software like milk where Microsoft spent more on shelf space than everyone else and they threatened that if you stocked OS/2 or other OSs that they wouldn’t see ANY of their software in that store.
I don’t know if you know this, and you might not even be aware of the federal anti-trust case against Microsoft during the last year that Bill Gates was CEO of Microsoft. M$ had a contract with ALL major PC hardware makers that they COULD NOT put, not even hiding, another OS on hard drives if someone bought a computer from them.
BeOS had MULTIPLE companies, at least 7 but I think the biggest one was Toshiba, that tried to hide BeOS on their “Windows” computers that they sold and M$ threatened to stop selling them Windows. That cut off any way for BeOS to get into the public eye. Be did everything they could to get noticed but nothing was enough and they went bankrupt. It was emails to Toshiba from M$ and other companies that got forwarded to the feds that started the anti-trust case against Microsoft which now allowed ANY PC company to install ANY OS they are willing to support without Microsoft able to use racketeering methods to stop them. If not for this, you wouldn’t see much if any PC hardware that ships with anything other than a M$ OS.
Unfortunately it was too late for Be by the time that Microsoft was forced to rip up the contract with all PC vendors allowing them to include any OS on their hard drives, hidden or visible.
Back in 1995 I first found out about BeOS (if you’ve never see the BeOS Demo Video → https://www.youtube.com/watch?v=BsVydyC8ZGQ ) I was STUNNED and amazed to see it running 24 videos (albeit short videos) at the same time. And you could INSTANTLY click from one to the other and the sound would INSTANTLY switch to the new video that were all playing in small windows all at the same time. That’s when I bought a PC specifically to run BeOS though I don’t think they were making the Be Machine by that point. BeOS is my second favorite OS of all time after OS/2 with MacOS third ONLY because it does EVERYTHING I “NEED” to do. Windows is lower than #50 on my list. If I tested out more OSs it would be lower still.
Once a year I watch that BeOS demo and cry because of “what could have been”. Also, I LOVE the BeOS song. Listen to the BeOS demo video to hear it. The song is a catchy tune but also tells you what BeOS could do. 
I would have loved to help out with Haiku but was working on average 14 hour days for a bank and then another organization and I’m married, between the two I never had time to help out. Then pain from diabetes forced me to retire, that and the things the pain and the medication did to my memory (which is maybe 25% of what it used to be which stopped me from being able to program. Formulas in spreadsheets is the most I can do now unfortunately. If there was a way for me to help with Haiku I would love to but I honestly don’t know what I could contribute at this point.