At least one can now have a fully working V2019 fairly bug-free with the pdf import feature if you find that useful, sands the stray lines.
I have kept the second latest unpatched V2018 so I can draw in red mode shaded. Unfortunately this one has the broken insert manager, so I need to use V2019 for that etc.
I also like to have a working copy of the latest version to help with answering questions on the forum here.
As I see it, if I eventually want V2020, my upgrade price from V2019 as opposed to upgrade from earlier versions should almost pay for itself.