Im not all that big of a Willie fan, but Im sure Willie can still hit the road in his tour bus and fill Luckenbach, or any venue in that nation and will still be welcome by his fans.
Willie is still touring only with a smaller group. He is also playing to smaller venues it seems now days rather than the larger arenas of the past. He has some 20+ dates for Feb/Mar.
Willie loves to play and loves to tour. A year or so ago I was talking to one of his crew and he said that it is not uncommon for him to receive a call at 8:00 at night and be told to get to the tour bus at midnight because Willie needs to play.
From that and other things, I get the impression that Willie keeps touring so that he will keep living. They also say that even when the band stays at a hotel, Willie stays on the tour bus.
On The Road Again is not simply a song.