We're all WW1 fans or else we would not be here - as is OBD in their heart of hearts if I may say.
That being said it certainly does not mean I don't like a good WW2 aviation sim either.
You can have multiple passions but love only one the best.
And for OBD the economic aspects are undeniable. WW2 sells.

Besides...the air war over Germany!
P-51's and 47's escorting the Big Boys in the sky.
And of course the 2nd BoB...plenty of drama there.
All with the OBD touch and attention to detail we have come to expect?
Yessir. Sign me up.