I've been using 2 double half-hitches (with a h-h tool) for years; faster for me, durable and fish don't care. Only time I use whip finish any more is for some saltwater flies and I'll do it by hand; even though I get a bad case of cracked/bleeding fingers in the winter, I tie the saltwater files with monofilamant and that doesn't snag like thread does. I also use thread nips (cheap Wiss knock-offs) for scissors so I never have to put them down to pick up any other tool. If I was tying flies for show, I'd go to the whip, but my flies would never be considered show quality so it's a moot point.

Regards,
Scott