MacMini core slows down after a few days of use (memory foot print >10GB)

Someone in the community directed me to the following quote:

There were many more findings against using 500K+ tracks in a roon library as far as the system performance is concerned. Conclusion was to use an extreme machine (>4Ghz) with 32GB memory, fast SSD, DAS rather than NAS etc. This translates into several thousand dollars not to mention having to provide a separate room to house a strong-fan cooled core machine for the acoustic isolation purpose. I was constantly asked to ditch the 8 year old machine and move forward. I drew a different conclusion. I scheduled an automatic daily shutdown/login job. My way of garbage collection. @noris, can you comment on such daily restart practice, anything I should be aware of?