[tluyben2]

We used to do large setups at companies for what was then called intra and extranets begin 00s. These were very read/write intensive as the staff and partner staff would be on there basically all the time during office hours and data was not great for caching as data changed a lot especially in some companies like large hospitals and universities. We used mysql (I cannot remember why) and we did a lot of performance testing at that time; we removed all joins which made everything a lot faster. This is no longer the case now but indeed many people still believe it ; not (only) because they saw or tried it back then, but also because it’s less strain on the brain to just do single table selects and use not FKs or joins.