I've tried non-free KDebian last month. It still booted without wi-fi. But what's most frustrating - it didn't detect any partitions on my drive. The KDE installer I mean. lsblk showed everything just fine. Same with Neon live.

And guess what? It works in KUbuntu. But ubuntu is just SO slow now. ( And I couldn't install it of my current dual-boot anyway because it does NOT have option to NOT TO install new bootloader. :-/ I love Linux (lie).