OP seems to be long gone but boy this is a weird thread to read. "1700's gentleman's warfare"... are we supposed to know what this term means, since it keeps getting used? ??? Can't tell if the complaint is that HBS BT is turn-based instead of real-time or what. Meanwhile HBS had other people mad at them because the game wasn't a perfectly faithful replication of the tabletop, like MegaMek with better graphics.
I think the issue some have with the implementation of turns in HBS game is that it combines movement, shooting and melee into a single phase. Compared to the "simultaneous" phases of tabletop, the HBS turns shift the balance towards big alphas that can remove an opponent before it can fire back. Multi-range weapon bracketing and multi-range weapon load-outs in general become less important as you effectively always get to decide where you move to take your shot regardless of initiative. The tabletop BT's simultaneous phase gameplay is arguably closer to real time combat than turn based gameplay.
I don't know what exactly the OP means by 1700's gentleman's warfare. There were never any practical, not to mention formal "turn based" characteristics in the warfare of that or any other era. It could refer to the pistol duels of late 1700's (which is not warfare though) where the dueling was
extremely formal. Ironically it could be argued that BT boardgame is actually closer to dueling than the HBS game because both duelists always fire their weapons at the same time ;D (though I do get what the OP means).
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HBS style "normal" turn based gameplay in video games is usually referred to as I-Go-You-Go (Chess, XCOM, Civilization etc). BT tabletop style simultaneous phase-based turns are very rare in digital form as they make the gameplay slower and harder to grasp, especially for multiplayer (MegaMek, some digitized niche wargames). A comparable approach that's more common for video games is We-Go where both sides plan their actions for a turn/period of time and the actions are then resolved simultaneously (Phantom Brigade, Combat Mission, Frozen Synapse etc). It's essentially "real time" gameplay cut into short segments and it's really what those phase-based wargames and BattleTech tabletop really aim to portray.
Personally I really like good We-Go and would love to see someone make a BattleTech game like that. The upcoming Phantom Brigade is closest thing to that that I know of (though it's big robots are much more Mecha than a Mech).