How anyone could prefer Windows to Linux is truly a mystery to me.
I doubt most people would base their decision solely on the update experience.
That being said when I used Windows regularly up to the end of last year, installing updates wasn’t really a problem or even something I really noticed. It didn’t really nag me to restart or whatever and just did its thing when I shut the computer down, taking half a minute longer every now and then - but I don’t care because I just wanted to shut down anyway.
Fedora (and I’m sure more distros) apply updates on restart by default if you update via GUI (“Software” in GNOME, “Discover” in KDE). This also requires a “double restart” (I noticed it because you also have to enter your LUKS passphrase twice). Sure, you can update packages in-place, but depending on the update (not just the kernel) this can cause issues/anomalies with the running system. I’ve had some Mesa updates without a restart cause games to stop working or misbehave, also video decoding.