No they are saying that they would only need 1 PuTTY session to their jump server, and then run tmux from there, giving them "tabs" in the SSH session.
If you only connect to one server yes.
Unless you connect from that server to others.
So then if you lose a connect to the first server you lost all your servers?
WSL? That's what I use.
I am ALMOST right there. I have had a few minor paper cuts.