Have same feeling here. I have bought FA-06/JD-XI which are great machines, but i find out that they are not replacing Juno-G. Juno has 4 individual outs (FA-06 only 2), Juno has different wave rom, Juno-G has some effects missing on FA-06 and it's synth sound is nice (i guess because it's based on reduced Fantom-X line).
Juno has a normal sequencer, maybe not that good as FA-06, but definitely usable. Acoustic sounds on FA-06 might be better (pianos/super natural drums), but surprisingly i like brass (saxophone/trumpet) patches better on Juno-G.
Or for example an arpeggiator - on JD-XI you cannot program user sequence for arpeggiator, but on Juno-G it's possible.
My Juno-G has a dead screen at the moment, but recently i plugged it in, played some old patches in blind mode and i can tell you, it's a thing of its own. It's lightweight, sturdy (except screen of course) and reliable.
I plan to restore mine or buy another Juno-G used.