Thats not to say Safari isn’t dragging it’s heals, but it looks like Apple are finally ramping up development speed. I gather they have been expanding the Safari dev team, and the latest announcements at WWDC look really good.
I actually use Safari as my primary browser, I prefer it (as a user) to Chrome. Although for debugging Chrome dev tools are better, I probably open it 2-3 times a day to check stuff, but never leave it running.