If your keep your next Macbook also for 5 years, I don't see a significant change in the ecosystem in this time due to the amount of existing Intel macs. I'm g

If your keep your next Macbook also for 5 years, I don't see a significant change in the ecosystem in this time due to the amount of existing Intel macs. I'm guessing you're not a Mac-only developer if you're contemplating switching to Linux, so deploying to ARM is not enough of a concern that would necessitate an ARM Mac at launch. The resale value after 5 years may be less than your current one due to people being less interested in Intel macs by then.