(backward compatibility translates to 'abstinence is consent')
Abstinence is a safe strategy. Deal with it. Observe computer science. Nearly everything that surrounds it is consisted of backwards compatible software / hardware. It's essential for sustainability. You can continue whining as much as you want, but you've always been avoiding this.
the bitcoin network is a consensus network where FULL nodes are suppose to agree on a set ruleset which unites them and keeps the network clean
you wanting to break this and have lots of fullnodes downgraded to not fully validate and also prune to not fully archive just shows how shameful you are to want to break bitcoin
..
by the way nodes made pre 2016 do not store full blockdata nor are part of the block or tx relay of all bitcoin users. they are instead via newer nodes handed a striped out version of blocks where old nodes cant fully validate all transactions nor propagate full blocks
this is not about sustainability. its about breaking security
you and your forum-wife keep trying to pretend that backward compatibility sustains the network. when actual fact it dilutes the security and also dilutes the numbers of actual full nodes.
stop shamefully misleading people into thinking that the stuff you admire which is to dilute the security soften the rules is good. the reality is its bad
you are very shameful in your adoration of exploits