The situation has not changed much.
There is a plug-in called “Append Import” that may help.
Please read the notes in this topic about usage and limitations: https://forum.audacityteam.org/t/append-import/20421/1
Unfortunately this cannot be used in a Chain (batch processing) but if may be able to simplify the job a little by positioning the tracks end to end.
This plug-in could be developed so as to concatenate multiple files based on a list of files, then export the result as a WAV file, then move onto the next list of files. If you would be interested in helping to develop this (in particular, helping with testing) then let me know and I’ll be happy to take a look.