I adopted Postbox for its cross-platform consistency while working in Windows, Linux, and Mac OS, and I like the way it works. Now that I am working solely on a Silicon Macbook, I'm concerned about the future. Having bought a lifetime license, I realize the company has no incentive to update the macOS app, as it won't bring them any more revenue from users like me. Given that the app seems to be based on Thunderbird (a code base that is a little long in the tooth), updating for Silicon is probably going to mean a complete rewrite from scratch. I would support a fundraiser for such an update and a subscription license for a fresh version of Postbox. The benefits of doing this would be felt by Windows and Linux users as well, of course. But if that revolution doesn't happen, I'm afraid the future of Postbox will be to just run in buggy and inefficient emulation over the next few OS releases, until Rosetta is phased out, when it will no longer run at all. That would be a shame, because I haven't seen any other email client (on any platform) that I like as well as this one.