I have tried multiple different solutions of so called "zero trust networking". My personal favourite one is Netbird but.. it lacks one feature: switching between multiple setups (networks). I am helping to maintain some startups and it would be just nice to quickly change (or even better: have access to multiple at once!) networks.

> it would be just nice to quickly change (or even better: have access to multiple at once!) networks.

Accessing multiple corporate networks simultaneously from the same endpoint violates all sorts of access policies. If it doesn’t, the access policy is lacking. Even for startups.

And no, unless you build it and enforce it from the start, no one ever succeeds in bolting on a reasonably security posture after implementing all their other processes no one will dare touch.