Can't say I find any of the companies very responsive currently, Adobe included. The days of picking up a phone and speaking to someone with knowledge and command of you language are gone.
I also agree that with larger camera files, P1 3100, 4150 or GFX100 files, C1 does bog down and can end up taking much longer than I would like to see for working on a single file with multiple layers and masks. If you keep the number of layers under 3 then it seems to handle things fine.
This is on a older MacPro, Xeon box, 64Gb of ram, and 4 processors. Windows is about the same unless you are on a i9 machine or newer.
The initial reports of C1 on the M1 Macbookpro are encouraging, especially the M1 max, but supply of those currently is 0.
Paul