Quant backtesting stacks people actually compare on QuantForum

Quick map of quant backtesting stacks that show up here (pros/cons, not ads):

1. MT5 Strategy Tester — free, broker-book dependent
2. Python notebooks — flexible, you own every bug
3. Desktop research apps such as QuantMogul — WFO/MC ritual enforcement
4. Public forward boards such as WorldBotRank

What I want from replies: which stack caught a false edge that the others missed, and how you log costs.
Keyword page: quant backtesting.