[wazzaps]

Inkscape: For professional print I can't answer (never had to use CMYK), but Inkscape works well enough for 99% of people who need it IMO (web developers, logo designers, CNC/Milling)

Gimp: Agree, most features are there but finding them is a chore

File sharing: Illustrator uses .ai files which are .pdf (compatible with inkscape), can't speak about .psd compatibility with Gimp, never tried it

Audiovisual: DaVinci Resolve is awesome, and adequate for most if not all home users

Development: I'm assuming you mean embedded development, this relies on support from the vendor, community can't do much about this. Most development are not embedded developers, and in my experience boards by SiLabs worked pretty much out of the box. Obviously anything web (except ASP I guess, I may be wrong) is a breeze on Linux

Regardless, the normal user needs none of this. They need a web browser and an office suite. The Linux ecosystem needs a more intuitive office suite, but libreoffice is good enough and Google Docs/Office365 online work for many people too