There seem to be two old threads about this, but one is locked and the other is derailed discussing the merits of locking threads so I’m starting a new one.
First, the reason why you currently have to physically push a button on the printer to start a print:
If a print is started when there’s another print still on the build platform it could cause serious damage to the unit. There are secondary reasons relating to too little resin or missing build platform, but most of those reasons would result in a failed print and perhaps wasted materials but no fundamental damage to the machine.
I understand that Formlabs requires this to keep warranty expenses down, but there are many users for which a remote start is almost necessary.
I would like to suggest the same thing suggested on the first such topic. The physical button press should be available as a confirmation that the printer is ready to print at any point after a print has finished. I will refine the idea a little by suggesting that opening the lid, removing the tank, or removing the cartridge would necessitate another physical button press. This way a user can remove a print. reset the printer, press the button, and leave. When the next job is ready it can be loaded and started remotely with no more risk than the current system. If anyone or anything has disturbed the printer since the last button press without renewing the confirmation you cannot print remotely.
For me specifically, the printer is located in laboratory space in a separate building from my offices. I cannot, because of regulation, work on a model in the lab space. This means that every print job requires two trips between buildings unless I have the next job completely ready to go and uploaded before retrieving the last print. If the next job is in anyway effected by the previous print, there’s no way to avoid the two extra trips.