BigSneakyDuck
In migrating from MATE to Gershwin desktop environment (GNUstep-based), we may be able to reduce the ISO footprint by nearly 0.5 GiB. Given the current minimum RAM requirement of 8 GiB, this reduction could provide enough flexibility to reconsider including an additional application.
In a recent test build that bundled applications like LibreOffice, Inkscape, and other commonly requested tools, the RAM requirement rose to 12 GiB. I do not believe we want to place that burden on users by requiring 12 GiB just to run the system effectively.
Providing a post-install utility to install popular applications quickly seems like the more practical approach. Then again, we already have Software Station, which could serve this purpose well.
With the recent interest in the Gershwin, we appear to be moving toward a more opinionated and cohesive desktop experience. It seems likely that MATE and XFCE will be phased out within the next few years.
This shift is driven in part by the trajectory of GTK development as Gtk3 is effectively a legacy toolkit, and Gtk5 will not support X11. As a result, continuing with X11-compatible desktop environments built on GTK becomes increasingly untenable.