I think there are a lot of other factors in that case.

The biggest reason why it’s rare to see regular cars get to a million miles is because they don’t get driven as much. At the average of 14k miles per year it would take 71 years for someone to drive 1 million miles. Since it takes so long to get there, many non engine related issues start taking hold like rust and obsoletion.

The bridge just creates imap/smtp servers, so you should be able to add it to thunderbird on Android.