Just one more subjective datapoint from someone who previously upgraded every 1-2 generations on Intel or AMD mobile platforms and really likes to have the shiny new stuff ("It's TWENTY % faster!"): I have absolutely no need nor desire to upgrade my M1 Pro (using it for web development). If the difference in performance could be felt at all, it definitely wouldn't be worth the price, and other upgrades are basically non-existent. I wholeheartedly recommend finding a well-kept M1 Pro or at least a discounted M2 Pro.