The way to get Linux more appealing is to get proprietary software makers, like Adobe, Microsoft (Office), you know the actual things people need to do their job, to make software for Linux. Steam Deck is a good example of this, it works because Steam ported the games to Linux…
While I don’t disagree with you about the potential of those alternatives they won’t cut it for the average graphic designer… usually not due to the lack of features but most likely because of the network effects / dominant position that Adobe holds over their field. People who need to collaborate with others and are pressured to get stuff done can’t afford the slightest compatibility issue.