I’ve not used Lightroom for some years now, but for me the main reason for using it was not so much for photo editing as photo management and workflow. For example sorting, selecting/culling, cataloguing, viewing, backing up etc.

As per the link in post #5 there are plenty of good alternative photo editors that are also photoshop plugin compatible, but not all are a full Lightroom replacements.

I don’t use it yet but the offering from On1 looks very promising. I’ve used their special effects application in the past and was very impressed. Their current program On1 Photo RAW 2019, also has a migration path from Lightroom and has a trial version to give it a test run.