If Bosch had sold the dishwasher with a rinse button, and then disabled it via a firmware patch, I would be pissed as well.
When Bosch disables old Home Connect users in 15 years, that’s exactly what will happen.
so they could be screwing me if they want.
They are screwing you. There was no reason for them to spend development money and servers that require constant money for maintenance to disable features on your dishwasher if there wasn’t profit.
So you are leaving your laptop behind as the server?
What’s your budget? I’d build a separate server but that’s me. I would think you could get old hardware practically free that would run your services fine by checking Craigslist and your local recycling center.