Perhaps you could share what is the model of your thin client? So we can get a grasp of what we’re dealing with.

Good starting points: https://www.parkytowers.me.uk/thin/

I’m thinking this would be the case if your instance had more than 1 user subscribed to that community in the large instance - but if it is just you, wouldn’t it be similar to accessing each instance and viewing the communities there?

Not sure if you’re hosting on AWS (if yes, free for the first 62k/month), else the $0.10/1k/month shouldn’t be too bad - https://aws.amazon.com/ses/pricing/

From my past experience with Sendgrid, it is trash, most of their shared IPs have poor reputation anyways, had lots of issues with them.

Running your own email server might be a good learning experience, a quick search brought up this all-in-one container solution - https://mailu.io/2.0/

Messing about with Postfix directly could be a painful experience, but yet another possibility.

Either way, new IPs will probably take some time to warm up, so don’t expect full deliverability for the first few days/weeks.

You should check that your cloud provider doesn’t block outgoing smtp traffic - iirc digital ocean and GCP do block.

Think this is more of a pipe-dream though, considering that 10 years is a long time for PC interfaces and internal interconnects. Swapping between different laptop manufacturers will be unlikely to happen, I feel.

Framework allowing for the whole mainboard to be replaced seems like a good halfway meeting point, and each case size being a constant chassis that hopefully will be supported for a long while.

Hope that other manufacturers follow suit, and at least have their own lines of upgradable laptops.