Reasons needn't be "sensible"... My intent is merely to help folks figure out their personal "why" - as that helps them to make the decision most suitable to their situation.Thanks. The answer to your question is not a sensible one: it's because I love Apple products, I tend to be an early adopter, I'm excited about the M1, and at this point in my life I can afford to upgrade frequently (especially since Apple is giving me $900 for my 2018 MBP). The other reason is that I've had to replace the keyboard twice on my 2018 and some keys are already starting to stick again. I don't want to replace it a third time and I don't think I can hold out for another 6-12 months.
I heard you regarding keyboards. I'm leaning heavily to making an upgrade and selling my 2018 MBP15 since I rarely use the big display (clamshell mostly) - it still has decent resale value right now, which may not be true in the spring if/when Apple transitions the four-port models from Intel to ARM.
I am wondering if I should stop my order for the air and go with a pro with less storage and just rely on my external SSD's for storing my photos.
Unless you're talking about archives you don't touch but once a month or less, don't skimp on internal storage. Being tied to an external drive gets really old really quick.
(also make sure you have a well thought out, multi-tiered backup strategy including offsite copies. Preferably with versioning)