The 7D came out in 2009. It is still a remarkably good camera. The fair comparison with FF as far as crop sensors go would be a 7D II vs 1D X or 5D III as they have 3 year newer technology in focussing and sensor. A 7D II with the focussing of the 1D X/5D III and an improved sensor would be an incredible beast.
5DS R, 7D II, EOS-M, Powershot G3 X, 300/2.8 II, 1.4xTC III, 2xTC III, EF 35 f/2 IS, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, EOS-M 18-55, f/2 22, 11-22