So Thunderbird is moving away from legacy technology that was built to make Mozilla/Firefox more than just a browser. They are doing this to be free to improve Firefox to make it more stable, fast, secure and minimal.
This leads to a completely independent Mozilla project, Thunderbird, that relied on this technology to get the axe.
That project thus is discussing taking the difficult technical step to start from scratch while keeping the user experience the same its been for 10 years.
This, in turn, leads to you criticising Mozilla for not focusing on making their browser fast, stable and secure. Because you are hitting some configuration/update/UI bugs that seem entirely unrelated to the core browsing experience. Thunderbird, BTW, has 25 million users. So even if you don't need it, some people do.
They allegedly made the browser fast when they split the Mozilla suite into Firefox and Thunderbird. I am using both of them as my main browser, mail client and web dev platform, they both work fine although a bit sluggish. Opera feels a lot faster for instance and the debugger is pretty clean and usable, in fact is the cleanest of the whole bunch with Chrome dev tools being the most clutteted.
The resource allocation decisions mozilla has been making is driving me away from their products. Throwing resources at recreating thunderbird with a new framework is a poor use of their time.
You are still not paying attention. Mozilla has decided to _not_ throw resources at Thunderbird anymore. The outcome of that is that the _community_ is debating to move away from the to be deprecated XUL platform.
This leads to a completely independent Mozilla project, Thunderbird, that relied on this technology to get the axe.
That project thus is discussing taking the difficult technical step to start from scratch while keeping the user experience the same its been for 10 years.
This, in turn, leads to you criticising Mozilla for not focusing on making their browser fast, stable and secure. Because you are hitting some configuration/update/UI bugs that seem entirely unrelated to the core browsing experience. Thunderbird, BTW, has 25 million users. So even if you don't need it, some people do.