I started to get maximum client reached errors lately, and looks like it's steamwebhelper:

 $ sudo ss -x src "*/tmp/.X11-unix/*" | grep -Eo "[0-9]+\s*$" | while read port
do sudo ss -p -x | grep -w $port | grep -v X11-unix
done | grep -Eo '".+"' | sort | uniq -c | sort -rn
     28 "steamwebhelper"
     10 "alacritty"
      9 "steam"
      9 ".DiscordCanary-"
...

(command taken from https://github.com/ValveSoftware/steam-for-linux/issues/9094#issuecomment-1380279208)