Not updating in a long time

[federation]

Generally speaking, how long can I leave Manjaro un-updated and still expect the system to not break when I eventually do?

[Shirshendu]

You should never leave a rolling-release distro un-updated. It might cause security issues and system breakage at any moment.
Stability of Manjaro un-updated <= Heisenberg’s uncertainty

[maycne.sonahoz]

Ask Schrödinger.
But ideally, update whenever you can.

[omano]

There is no answer to this question.

[cscs]

If you are someone who can navigate ‘bumps in the road’ like manually installing needed keyrings and such … then you can probably wait months or more.
But it is not advisable at all.
For example - running an outdated browser is a real security concern. Also your ability to install new software will become increasingly diminished, or even destabilizing to your running system. And so on.