Are folks encountering problems using the 14" M1 MacBook Pro in clamshell mode with external monitors?
I’ve seen various complaints about this and am pondering using the new Studio Display with a new 14" M1 MacBook.
If this won’t work seamlessly then I’ll ponder getting Mac Studio Hardware.
Can you return to Apple in your country? If so it might be worth trying out the display. I doubt anybody can give you relevant anecdata with an unreleased product 
I suggest waiting to see. Clamshell mode causes hiccups for some people some of the time (me included: my M1 Air display sometimes does not come on if I disconnect from the external display whilst everything is off. A reboot or reattaching the external display fixes it. And it is intermittent).
I would hope and expect that Apple’s own solution solves this problem as the MacBook should be able to communicate nicely with the Studio Display’s A13 processor and work seamlessly.
Should.
Was referring to clamshell mode with external monitors. Yes Studio Display will not be available before March 18 in United States.
I’ve been thinking about this lately. It makes me hesitant to get a 14-inch. I don’t have an M1, but I’ve had issues in clamshell mode with every 13-inch Macbook Pro that I’ve had. The issues don’t seem to occur with the 15/16-inch MacBook Pros in my experience.
I have the M1 14" MBP and it does take a while for the external monitor (Samsung) to come on if I put the MBP in Sleep mode. Many key presses and mouse moves to get it to come on. Usually less than 30 seconds, so it’s more an annoyance than a problem.
I don’t have problems with a 14" and Samsung external monitor. It always turns on and works as expected. I guess it depends on the model of the monitor.
Solved the problem by slicing through the Gordian knot. Ordered Mac Studio and Studio Display. We don’t need no stink’n laptops (nor badges for the matter)! 