How should I play as White if Black Defends the Tartakover QGD without ...h6? This question is related to another I just posted, but it is actually a different question: if Black Defends the Tartakower QGD without an early ...h6, and I am an Anti-Tartakower–Makogonov–Bondarevsky vartiation player (5... h6 6. Bxf6 Bxf6), should I take an early Bxf6 nonetheless, by my own initiative, or should I keep my Bishop on g5?
It depends on your own tastes, but I'd recommend not taking. Taking after ...h6 is justified because it essentially costs Black a tempo (i.e., playing ...h6). If you take without provocation then no one's losing tempi, you're just making an exchange.

If you really like trading on f6 then go ahead, but objectively you shouldn't have any advantage.