Why not put crossover networks in accessible compartments?

A few speakers used to come with the crossovers encased in an entirely separate box, that you then connected with multiple leads to the speaker itself.  You don't seen much of that anymore.  If I remember correctly, one reason stated was trying to avoid vibration.

Isolating the crossover from vibration is a good thing, easily accessible compartments that allow changing components is a different thing, how often a speaker need to replaces crossover parts?

I believe encase in resin helps isolating the crossover components from vibration.

Some speakers do have a separate compartment such as the Dali Epicon line. Great way to keep the parts out of  direct proximity of the bombastic cabinet. Nola and others use outboard crossovers which add wiring complexity, but totally removes the vibration sensitive parts from the cabinet.

Thank goodness the dismal science doesn't rule everyone.

I believe a lot of these manufacturers would not have the crossovers accessible on purpose to hide the cheap parts they are using.