30 years at Microsoft. I think he'll be fine. Us B and C tier company employees with low six figure salaries and 5 year vesting schedules will be going as long as someone continues to pay us.
The thing is, this whole debate is happening above the baseband. Linux phones (Librem 5, PinePhone) tried to solve this and went nowhere, you can open-source everything above the modem, but the GSM/LTE protocol stack is still a proprietary blob with DMA access to your main memory. It's basically a second computer in your phone that's directly addressable by carrier infrastructure, and nobody gets to audit it. Doesn't matter if you're running iOS, Android, or postmarketOS. Qualcomm/MediaTek own that layer and it's not changing anytime soon.
There is barely anything wrong with Xcode. I'd rather it than the bloat that is Android Studio or Visual Code. Haters gonna hate. I also write apps for every Apple platform and really no complaints except I wouldn't mind a better Vim mode (it does however suffice!)
Currently sitting in an open office floor plan surrounded by 4 other developers less than 3 feet away speaking in Hindi. I don't speak Hindi. There are constraints to this open door distraction.