Max pseudo terminal limit in linux

[oakes]

Is it true that wish (or gliderlabs/ssh) allocates a new pty for each session? If so, doesn't that mean it's possible for the server to hit the max pty limit specified in /proc/sys/kernel/pty/max if there are a lot of concurrent connections? I imagine this would've happened when charm.sh hit the HN frontpage. I'm just wondering if this is something that is possible or if i'm misunderstanding how it works.