Parties can absolutely change with enough pressure.

I've been alive long enough to watch the Republican party almost completely change. Yeah, they were always stupid assholes. But they were not even close to THIS crazy and traitorous. Their base changed them. The liberal base can change the Democrat party.

The Democrat party is ESTABLISHED. No 3rd party is even remotely close to being established. It is not the time yet to vote for a 3rd party and won't be until a 3rd party actually gets serious and starts winning smaller elections.

This exactly. It's nonsense to say that the party can't change because it has changed.

I think it can be ship of theseus’d, just replace all the key people in the party and keep the name.

At this point it's easier to just nuke it