Meh, I've been a mac user for 15 years professionally, usually alongside some desktop pc for gaming, and I upgrade when I damn well please, which is typically when they have a notable leap in performance, my laptop gets stolen, or my needs change, which should hardly be surprising in terms of progression through a career.
Their recent hardware is proving much more capable as tools than the budget i5 I had before, so I upgraded. In terms of machinery expenses, it's more than I'd like to spend on RAM and ssd than I'd prefer (their pricing ladder is comical) but the product is amazing. I'm going to wait as long as possible before I upgrade to Tahoe though, seems almost DoA