system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why 3G is basically useless now?

I've noticed among myself and my friends that the 3G technology doesn't work as well as it used to, or not at all. When I say not at all, i mean if our phones drop from 4G to 3G there will be little to no service available. Phone isn't connected to the interwebs.
gpt
More physical assets and infrastructures are being adjusted to 4g and 5g now,  which leaves very limited resources left to handle 3g signals and data.  This slows any 3g applications down immensely to the point of non- function.