I don't think this is an SL problem, I think its some sort of underlying internet problem.
And I don't mean people's home internet.
It feels like a lot of things lately online have weird periods of "running like ass". Streaming services that randomly decide to be potato quality. Almost every gif host seems to randomly not be able to load well even though say, a whole 4k Youtube video plays fine. Some games, like Fortnite get weird lag spikes constantly.
Just some examples, they also come and go.
Its more noticible with SL, since it has to download everything, but sometimes I just wonder if there is some sort of underlying issue somewhere on the web causing all these underlying issues or if its just companies not keeping up with demmand due to costs.