I just got a new iPad and had it do the auto update thing from iCloud and an hour later everything was loaded onto it so it was ready to go just like my old iPad.
I’ve not reinstalled MacOS in 15 years or so and am on my fourth Macbook in that time. Have always used the Apple Migration tool and have never once felt the need to reinstall MacOS.
A touch excessive. It’s not windows, the kernel is far more efficient and isn’t prone to bloatware and expansion of OS due to retained updates etc
I’ve noticed zero degradation in MacBook performance over periods of years. Plus you’re adding unnecessary read / write cycles to the SSD, which hates being used that way.
So you’re actually likely to shorten the life of the SSD and the system with frequent full reinstalls