Maintenance based on the age of trucks and buildings

Just like in real life, buildings and trucks age and require more expenditure to continue functioning properly
So why not set a "maximum" age for buildings and vehicles, so that they must be replaced after a certain number of years?
Otherwise, maintenance costs for these items will rise and the likelihood of breakdowns will increase
For the trucks, an additional garage could be built to service these vehicles, which would require extra materials, and they would then be taken out of service for a period of time
For the buildings, this would involve demolition and reconstruction
And the older the vehicle or building, the fewer materials can be recovered

3121 is very good.
p.s.: In TTD, it's a game mechanic. In this game, it's a simplification (possibly a difficulty level).