I get the day off...

[TaigaUC]

I personally don't think PSO2's downtime is that bad. Half a day in the middle of the week.
Pretty sure most online games are about the same.
I expect that one of the things they do during maintenance is backup the server data. Dunno how long that actually takes.

Occasionally, they announce extended maintenance.
They used to often extend the maintenance without warning, but they haven't screwed up like that for a long while.
Took them about... two years? to get the hang of that.
Shame. I could use some compensation triboosts now.

[Maenara]

I've actually been maintaining a pretty healthy supply of Triboost 100s, lately. Easier acquisition, combined with better discretion on when I should be using them has led me to keeping a constant supply of at least ten on my person for around a month now.

[TaigaUC]

I've been using them to try and speed up leveling, because I hate it.