back in the early 70's EV had a 30" woofer.
I would love to get my hands on one of those. I remember seeing my first one in a HI-FI (Remember those?) shop window back in the mid 70's. WOW it was cool looking.
There ahve been various 22-24-26" drivers over the years. But none have really "stood the test of time".
One of the problems is replacement parts-if you can get them-they are EXPENSIVE.
More common drivers are much more easily fixed when the time comes-and remember that a loudspeaker is a MECHANICAL device-so it WILL wear out-just a matter of time-so that needs to be part of the "overall plan/ cost" to fix/replace them at some point.