I like wing chun because I like wing chun.
I like other arts and MMA because I like the other arts for what they are.
I don't like fighting, but if I have to I'm sure as hell not going to worry about style: I'll use whatever I can remember and pull off.
On a brief note more on topic: I don't do chain punches in a fight, but I think they have value as a drill. The straight wing chun punch up the middle
does have value however against everyone I've tried it against since it is easy to achieve a slightly unexpected angle, accuracy and timing. The third or fourth time, they should have predicted it, mind, and will probably be easily counterpunching you out!
You
have to mix it up. That's why I don't buy your assertion, KF, that the Leung Ting (and yes, I'm picking on LT line here because 9 times out of 10 the youtube wing chun full contact ****fests are LT) clowns who go full contact nutso with protection against others from the same line and just end up with a one angle (straight from the front!), constantly advancing chainpunch fest with half-arsed crappling... are getting anything at all from their experience. You say they get more than the chunners who've never done any FC stuff but I don't believe so. They get a false sense of confidence and invincibility. Within the first 30 secs I would say of FC against boxers, Thai boxers, grapplers, kyokushin, even Tai Chi... I had I realised chain punches weren't going to cut it in terms of strategy or power.
Again, with practicality in mind, when I work the bag I throw in wing chun, boxing, all sorts. Why? Because the bag isn't trad WC and that's good cos I don't want to worry about restricting myself to trad anything when the **** hits the fan. It's not that I don't believe my chun won't work (that's an irrelevant argument), just that you're an idiot if you think sticking to any one system has merit in a fight. So, why do I do 'ineffective' chun stuff on the bag? Everything has it's place. It's not rocket science to switch from a boxing stance to a chun stance, and back to a pin ma or whatever, just as it's not rocket science to switch from a boxing overhand right to a back-stance wing chun hook, to a front-weighted lead boxing hook... most things have their purpose (in the case of the hook the wing chun hook is definitely weaker than the boxing hook, but the vertical fist makes it less likely to damage your pinkies and it's easier than the boxing hook when they're pressurizing you and pushing you onto the back foot).
Turned into a long post. Hope it's useful for someone.