Noel,
The user has suggested a new message delivery option he would prefer,
a form of digest where it only sends emails once a day or so (as with
the digest), sorted by thread, but as individual emails not a single
digest email.
He could set a filter in Thunderbird to automatically move incoming group messages to a separate folder. I have one named In-GMF, some for a few select other groups, and an In-Lists for all the rest. That makes it easy to defer reading list messages until a convenient time. There is also the sort by thread function in Thunderbird itself to assist with that.
That said, the Groups.io suggestion box is the beta group - no one from Groups.io monitors GMF messages. beta@ is an unrestricted group so you can expect any suggestion there to receive comments from other interested users.
Shal
Shal Farley