I would have been happy if Tamiya had continued and expanded their 1/25 scale line, especially the RC versions. Their 'motorized' 1/25 is really how I began in this hobby but
it was limited with the gearboxes and RC equipment available then( not to mention my very limited skill set at the time). If one has limited space 1/25 is great.
Large enough for functional chassis, link track( not 'rubber band' tracks) and is probably the closest to G gauge railway items. Would be nice if zinc alloy tracks and
sprockets were commonly available for them. Bandai's 1/24 scale ( c'mon guys!) Panther even sported real rubber tires.

Coming up with all that goes into making a larger version of the Centurion would represent quite a capital expense. Almost certain someone has already run the numbers.
If it was worth it you'd might already be deciding how you want to paint it.

Jerry