There's no rush to move away from MailCatcher or MailHog, but if you're not using those solutions already I see no reason to use them over the maintained options.
> I see no reason to use them over the maintained options
Things that don't change over a longer time period can be more comfortable sometimes. Especially things you use often and build up a sort of "muscle memory" about.
Yeah, people underestimate the value of “finished” software: in an ecosystem with lots of stable dependencies, there’s very little reason for useful software to change constantly.
Even "finished" software needs maintenance. Nothing is ever bug-free so needs fixes. And it doesn't live in a vacuum, the ecosystem evolves and continuous adjustments are needed when APIs evolve or libraries change.
In well-written software, the maintenance burden is low, but it's not zero. Without any maintenance, you can maybe run some piece of software in some closed-off container for a while, but it will keep rotting away and eventually you won't even be able to compile it anymore.
Commenter was just making the fair point that the dependencies are out of date.
Maintenance doesn't always mean UI redesigns or non-compatible config changes. Sometimes it is just fixing bugs and updating or replacing old dependencies.