Keep in mind that the pandemic is still ongoing, and as such thr burden on internet infrastructure remains high, especially in some areas.
Over the past months i've heard and seen countless examples of people experiencing that there is a limit to the amount of people that even the best infrastructure can handle before its reliability and speed start being affected.
It's often an in-home problem, but in cities there are also entire areas where the traffic manages to genuinely congest the larger arteries, so to speak.
Mostly in university student-heavy areas i've noticed, i'm inclined to joke about porn but research data can be vast.