Only Ford/GM/Chrysler are stupid enough to not include a drain plug on their transmissions. Basically everyone else does. Toyota, Honda, Nissan, Subaru, etc, all have drain plugs in their transmissions. The Saturn S-series has a drain plug because they were actually trying to compete, and overseas GM cars such as the Catera and Spark have one, and the transmissions they make for others (the 4L30 that BMW used, for example). Transmissions shared between Ford and Mazda have a drain plug on a Mazda but not on a Ford
Transmission filters don't do much and don't need to be replaced. Even cars with spin-on transmission filters (some Subarus, Saturn S-series, etc) only require a filter replacement if it gets damaged. There is no combustion in the transmission.
Even before so-called "lifetime fluid" nobody ever changed the ATF anyway
Maybe you might like the ZF 8-speed? It has the filter integrated into a replaceable/disposable oil pan.
Also, Honda makes it very easy to change the fluid on their CVT