This was my experience too.

Had a Delta flight that used gogoinflight internet. On my initial outbound flight I noticed DNS still worked without paying, so when I was flying back home, I had set up a simple iodine tunnel on my homelab in advance.

I was surprised by how completely unusable it was. Of the few sites I even attempted to load, I only just barely managed stallman.org after modifying my browsers maximum timeout via a flag (and it look ~5 minutes).

SSH was also not usable, even a simple "whoami" took ~1 minute to finally execute.

So yeah fun as a cool gimmick, but other than _maaaaybe_ connecting to a single IRC channel, its not practical for anything.