I, too, saw that Weather Report show at the Orpheum in Boston on Saturday, November 11th 1978. I almost blew it off, as I had spent the whole night up jamming with my band. I was also looking forward to the Grateful Dead on the 14th at the Music Hall. 6pm rolled around and I almost blew it off, but decided what the hell. Boy, am I glad I went. It was amazing (the Dead later that week weren't so bad, either). Later on the next summer I also caught the Joni Mitchell tour. Jaco was just at the top of his game at that time. If I recall correctly, those shows were all under $10.
Ah, those were the days!
Edwin