In a recent game of Power Grid, someone we play with regularly insisted on a rule that you're not allowed to purchase a "lower" technology power plant than you already have. e.g. if you have 13,17,25 ...
Are there any fair rules for shortening the playing time of Power Grid? It seems obvious to end the game on less powered cities (rather than the 17 default), but this often skews the phase 2 for the ...