On 1.6, I tried "] add Plots" and julia got stuck.
Please file an issue describing the situation: https://github.com/JuliaLang/julia/issues/new
After the issue, I nuked the .julia folder, and now it is taking too long to clone the "JuliaRegistries/General.git" repo.
By the download speed, it might take a few hours before I can plot something.
It also seems that just doing "git clone JuliaRegistries/General.git" is much faster than doing "] add Plots"
> (@v1.6) pkg> add Plots
Installing known registries into `~\.julia`
Cloning registry from "https://github.com/JuliaRegistries/General.git"
Fetching: [==> ] 3.4 %
I gave up because it's just too slow (more than 15 min to get to 3%).
Maybe plotting is indeed faster, but I don't think I'll actually get to that point.