I think we have two problems to solve:
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an ever-increasing memory requirement is building up.
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the system becomes unbearably slow with increasing use and database size.
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the integration of Qobuz
The first point concerns MacOS and Linux derivatives from the Debian family. With Arch derivatives (Manjaro) I could not verify this and my huge Windwos10 database (1.4 million titles) also constantly shows around 70 % memory utilisation with 16 GB physical main memory. But this does not protect me from the second problem.Manjaro and Windows also need to be restarted after prolonged use so that everything runs smoothly again.
With Qobuz, some have also observed that albums disappear and reappear days later. Qobuz itself is working on a solution. Unfortunately, I don’t have the possibility to use my Qobuz subscription via Roon yet, but Tidal plays perfectly and my collection also offers enough great playing possibilities 
For point 1, Dylan has already lit a small light of hope here. Good luck and good ideas in developing this solution.
Solution for point 3: