Fuchs
Well-known
Don't worry. People who want the R-solution have their R lenses already, and the $7000 M is not going to get new buyers into the R system en masse (or give them anything that the $2000 Canon 5D hasn't been giving them for a long time, actually). If there is a price hike, I expect it to be short and not very significant.
The R line is a great system with good ergonomics, and the suggested R5 is a very nice, compact and versatile camera.
I think the biggest price increase in R lenses was when the cheap Leica R to Canon DSLRs became widely available, reaching insane rises when the original 5D came out. They seem to have stabilized in the last 3-4 years