I've been carrying my Arc daily for a bit over a year and a half now and I still love it. I carried a Charge TTi on and off for 14 years and a Free T4 for a while, and before that, my first Leatherman was an original Wave, which I still keep in the basement for guitar tasks. The Arc outperforms them all. Love the blade, love the tool set. The Free's redesigned outside-access/one-handed/locking group of features might not seem important if you're used to the older designs, but in practice it makes the tool easier and safer to use, and if you use it multiple times a day, the ease of use and lack of hassle adds up to a noticeably better experience. The Magnacut has much better edge retention for my daily use than the S30V on my old Charge, which means less maintenance, and the smoother curve of its profile is easier to use across the entire edge. No problem using this as my main folding blade. The Free clip is also better than the kludgy insert clip for the Wave series tools - weight is one thing, having the tool sling around your pocket as you walk because of a loose clip is another thing entirely. I do keep it in my pocket, not really a sheath guy anymore. I keep the bit extender and a full-size bit in my wallet for those special moments.
Worth it? Well, it certainly has been to me. I don't buy stuff like this very frequently and I use it all the time. I plan to still be using it 20 years from now. If I was choosing a new multi-tool, I have to say (for me) the Charge+ TTi looks like the odd one out in the Leatherman lineup now. The Curl feels a bit clunky in the hand but has a nice basic tool set, the Wave+ is a classic and still a banger at a good price point, the regular Charge+ seems like a worthy upgrade for the extra $40... but then the TTi really functionally offers nothing extra. If you're already considering dropping two hundo on a multitool, $50 more for the improvements on the Arc is money well spent.
One thing I think I'd be pretty interested in would be an Arc-ish update to the T4. A thumb stud and Magnacut blade with drivers and scissors in a smaller format.