Is there a time limit for bulb mode (generally)?

I have come across that the SAMSUNG NX1 has an 8 minute limitation in bulb mode.

I understand that there could be reasons for this; reduce risk of damaging sensor, hardware limitations...

I'm not too fussed about the reasons why (at the moment) but I'm wondering about other brands/models.

Is there generally a limitation in bulb mode?

I know that with my OM-10 film camera, bulb mode has no limitations (probably because it's mechanical).