Me and OH tend to buy things with a view to cannibalising.
I.e. we already had a fridge/freezer in the kitchen, but the freezer section was too small for us, and we thought about getting a stand along freezer for the garage as an overflow. Instead, we bought an identical fridge freezer. After around a decade or so, the kitchen one broke down, and we got a repair man to cannibalise the garage one by taking the working part needed from it to put on the kitchen one. By that time, we didn't really "need" both anymore, but kept the old one anyway. Then the kitchen one developed faulty door seals, so we took the ones off the old garage one and fitted them ourselves. Then one of the plastic salad boxes broke, so again, took one from the garage. We ended up keeping the kitchen one going for around 20 years!
I do the same with my computers for my business. I need four. Instead of having 4 different ones, I buy exactly the same make and model. After a few years, things go wrong, i.e. broken keyboards, broken laptop screens etc., so I just cannibalise to keep as many going as possible. Often also buying second hand or reconditioned identical ones to cannibalise. None of my current four computers are under a decade old! I'm just about to replace them all as they are now all "triggers brooms" and really showing their age, Of course, I'll be buying four identical ones!
It was one of my clients a few decades ago who told me of the idea. He ran a small fleet of freezer vans (he was a wholesale frozen food merchant). All identical. Not bought at the same time, but he bought roughly one new one every year, but identical as far as possible (vans didn't change much year by year in those days). When he bought a new one, he cascaded them down and kept the oldest for cannibalising whether light clusters, doors, etc - basically all the "consumables" from heavily used items! He had a "tame" motor mechanic firm who kept the oldest "scrap" vans in their yard to cannibalise as and when needed.
Even my father in law did the same. He had an old Saab and to keep it going, bought a couple of other identical saabs just for parts!