It’s a well known trick that installing a SSD in place of the conventional Hard disk can breathe new life into very old machines. My mid 2010 Macbook Pro is one such example, being over 8 years old.
In particular, within Emacs - mu4e responds much more quickly and there is significantly less lag in searching / accessing emails and HTML rendering.
The other advantage of using a Mac over Linux is that installation and setup instructions are more often available out the box for the Mac OS (though this is changing).