Sorry, no, even if it works for you (and I’m glad they do), it still sounds unhealthy and is a red flag. Red flags aren’t an immediate “this is a deal breaker”, it is a “this needs your attention” so you can see if it’s something you need to avoid or not. And just because everyone is in agreement and feels comfortable with something, doesn’t make that thing healthy. Communication is a good first step, and I’m not here judging your own situation because I don’t know the full situation, but simply being comfortable and in agreement over something doesn’t mean that thing isn’t dangerous to the relationship or the individuals in the relationship.
A 2008 machine and a 1996 machine are going to be drastically different in capability. Even the 2008 machine will be reaching certain limitations depending on what you want to use it for, and what the specific machine is.
More power to you for trying to recycle and refurbish older tech, I think that is a very positive thing! But I don’t think replacement parts will magically become available if they aren’t already, only currently available parts might become more affordable or available to the public. What I’m saying is, don’t expect an LGA 1151 motherboard to come into production again.