In recent years the MBP line has been updated towards the end of the year (Oct/Nov) or early (Jan):
* https://buyersguide.macrumors.com/#MacBook_Pro_16
So if you can 'limp' along towards the autumn/winter/Christmas, then it's probably worth the wait to get the M4 (or pickup an M3 when the price presumably drops to clear inventory).
In recent years the MBP line has been updated towards the end of the year (Oct/Nov) or early (Jan):
* https://buyersguide.macrumors.com/#MacBook_Pro_16
So if you can 'limp' along towards the autumn/winter/Christmas, then it's probably worth the wait to get the M4 (or pickup an M3 when the price presumably drops to clear inventory).