To the OP updates are par for the course. Every device receives them so the purchase of a new device isn't going to stop or slow this. Most updates are security patches and most users don't feel they get enough of those fast enough. Not sure if this was what fuzzylumpkin was jokingly eluding to by bringing up the Moto G, as in it never gets updates or they're very slow to update, but the only way to get out of updates is to get something that is already 2 years old. If you can find a factory new one, you'll probably get several updates out of the box and then nothing.
I can't say that I've gotten an S10+ update in several months that has done anything to outwardly change the phone. So my question is what update did you receive and what do you believe is different?
Can anyone name an update since the one that brought Night Mode to the camera that has visually or usably changed the device?