I haven’t been using RawTherapee for a while now and am very impressed with the feature set that it brings to the table. So much so that not long ago I booted into Windows and opened Lightroom and absolutely hated it. Couldn’t wait to get back to RT.
Is RT still being developed? I noticed that there hasn’t been a release since February 2020.
It’s still developed as others have pointed out. However I am not sure when there will be a new stable release. It does seem to be on the horizon, though. The work is being done translating everything to different languages and the main dev seems to have some house renovations stuff going on ( see the newer replies here )