I agree. Their “new” software is really just the old software with a couple of new features that I would never use.
All Steinberg has to do is run their Cubase 9.5 code through a 64-bit compiler and … poof! … 64-bit support. Surely no more than an hour’s work for one person. However, I suppose that they would then have to do the same for v9, v8.5, v8 …
At the moment I’m staying at MacOS 10.14.6 with no intentions of upgrading and if, for some reason, I’m forced to upgrade then I’ll move to Windows. A new version of Cubase 10.5 Pro would cost me $700 CDN. I’m not going to do that.