I used primarily software with keyboard controllers from the late 80s to the early 00s, and only came back to all in one units when I could use my software in them, if you have just been used to hardware then I suppose the Songbook would seem advanced, and from that perspective I can understand, it’s just that for me (Personally) it’s just basic and nothing special.

Each to their own, I suppose

As to gigging, no I don’t, but I have never seen the songbook give any gigging artist an advantage over any other manufactures keyboard.

Bill