Unless they’ve changed in the past few years, most parts are proprietary and will have to come from Snapmaker or their resellers. Swaps are usually at the module level. So the flexibility in parts sourcing is much lower than your Ender 3. On the plus side, they’re usually good about honouring warranties.
Nozzles with other aperture sizes are available from Snapmaker for the U1. It’s possible that the nozzles are a standard size (my older Snapmaker 2 uses the same nozzles as your Ender 3), but I can’t find a specification anywhere.
TL;DR: If your priority is varied parts sourcing for longevity, maybe look at a different manufacturer.
Unless they’ve changed in the past few years, most parts are proprietary and will have to come from Snapmaker or their resellers. Swaps are usually at the module level. So the flexibility in parts sourcing is much lower than your Ender 3. On the plus side, they’re usually good about honouring warranties.
Nozzles with other aperture sizes are available from Snapmaker for the U1. It’s possible that the nozzles are a standard size (my older Snapmaker 2 uses the same nozzles as your Ender 3), but I can’t find a specification anywhere.
TL;DR: If your priority is varied parts sourcing for longevity, maybe look at a different manufacturer.