For over 40 years, I have been an ardent fan of the C programming language. It is brilliant for small (<< 100,000 SLC) systems #programming projects.
But I do believe that almost all modern languages adopting C's ALGOLish blocky #syntax harms language evolution. This syntactic monotony is the consequence of the rightful dominance of Lex and Yacc, the general disdain amongst the programmer cast for LISP's brilliant parenthetical s-expressions, and the difficulty of implementing well ISWIM's beautiful offside rule.
I know I am in a wee minority, but I do wish that more programmers learn to love the plain, succinct, cogent syntax of Miranda, Haskell, Agda, et al.