But also, you’re wasting a lot of storage space that way, especially if you do it often. You really only should backup your home directory, it contains all your data. You can simply re-install the rest from the internet.
this is about having a robust supply chain which is important for everyone
It is not. If we buy solar panels today, and the supply chain crashes tomorrow, that won’t bother us at all. Solar panels are a very durable product, and once bought, can last at least 20 years. So we would have more than enough time to find a proper replacement. So, having unreliable supply chains is not a problem with solar panels.