I don’t think there is any significant difference between MBA and MBP when it comes to durability. Both are very solid designs that hold up very well.
You mention lots of ports for peripherals. Do you need more than two TB ports (MBA)? Have you considered a hub? Do you value having ports on both sides of the machine (MBP) or is LHS good enough (MBA)?
IME, M2/M3 are so powerful (heck, even M1 was) that chances are 95% of users will be fine with a vanilla M2 or M3 for almost everything they do. And now there is actually a 14" MBP with a vanilla M3.
One thing that does IMHO support going MBP over MBA is the screen and speaker. The display is clearly superior on the MBP, both in terms of resolution (sharpness) as well as brightness. Also, if you use the built-in speakers, the MBP has the best set I’ve ever heard on a notebook. Cleary superior to the MBA.
The MBA is a great notebook. If its screen and audio are good enough, and you don’t mind just 2 TB4 on the LHS, chances are you’ll love it. If any of those items concern you, get the 14" MBP instead.
For longevity, make sure to get ≥16 GB RAM and at least 50% more than the typical storage you have used the last few years.
And once you do have your new Mac, enjoy it without regrets. If the point comes where you do need more RAM or SSD, don’t fret. Resale value is awesome for a well kept MacBook. My 2021 M1 Pro 14" will right now net me $1200 on sellyourmac.com or backmarket.com. That means it effectively cost me $1600 for the past 24 months of use. That’s just $67/month. That’s less than I pay for my 1 Gbps fiber at home and barely more than I spend for T-mobile cell service every month. Once you realize MacBooks have such great resale value, you just get now what you need now, enjoy using it, replace it when necessary, and enjoy always having the greatest at comparably low cost.
Ultimately, at the otherwise same config, the 14" MBP costs $200 more than the 13" MBA. You decide if the better screen/audio/ports are worth that or if the lighter weight and lower cost of the MBA makes more sense to you. Also, you can always get one first and later replace it with the other. Apple has a very generous 14-day no-questions-asked policy when it comes to returns. It’s solid. No shenanigans. Try them and decide yourself. No risk really. You’ll be fine wither way.