I dont know if the Jr should be retired, but based on reading Eric's post, I will definitely agree that the 4000 should be retired.. it's hard for the STAR Team to make changes to the platform anyways (and the Junior), but the major reason I think the 4000 should be put into retirement because of it's video hardware.. eventually all 4000s will suffer through degradation (as us "fans" know it to be) if they haven't already, and it's sorta like Microsoft putting OS platforms into retirement.
As for the XL, though, I think it should stay.. unlike the 4000/Junior, the XL is not that hard to make remote changes to because of it's ethernet port (?), but it is also OS-ran, just like the IS. Though it does not display anything except an LF and ID anymore, it can at least do an LDL like the IS with having part of the LDL chopped off for the LDL ads, but without the fancy flares and animation..

And as for the squeezeback, I cannot see that being implemented, sadly..

The original sqeeuzeback seen from 2006-2009 (with the sunny background) never displayed local information on the XL, so why should the current one?