My employer would like a camcorder to record a private concert, and occasional family events, and I offered to find some suggestions for him. I only use my phone for video anymore, and don't have up-to-date knowledge on what exactly to be aware of.

Some key features I'm looking for:
1. Tripod ready
2. Ease of use
3. Long record time before having to change storage
4. Ease of transferring recordings to a Mac. Corded via USB is probably preferable to wireless.

I wouldn't say 4K is a requirement, but my initial searches indicated it's pretty common now, I think.

He's got the budget to buy whatever fits the bill, but doesn't need bells and whistles.

Suggestions appreciated.

Been out of that part of the business for a while now but my first thought is SONY.

If you are recording anything where audio quality is important (like a concert!), make sure to get a camcorder that has a jack for an external microphone. The built-in mics are usually not very good.

Rode makes excellent microphones for use with camcorders across a pretty wide range of price.

Also note that on-camera videography microphones mostly fit in two categories, highly directional mono mics and stereo mics that pick up pretty much everything. Which one you want depends on what you're filming and what sound you want in the video.

A DSLR or equivalent is also capable of 4K video, and for most people has displaced the dedicated camcorder. Feature length movies have been made using DSLR’s, or for that matter, iPhones.
SD cards these days have enormous capacities and therefore can hold a long video recording.
I agree that a separate microphone is important to get good audio results.

Here’s a review of best DSLRs for video.

For myself, I use an Olympus OM-D E-M5 Mark II. You can attach a battery grip to it to double battery life, if that’s needed. That camera doesn’t do 4K video, however. If I were to buy a camera now, I would get one with 4K video capability.

Here’s another comparison review, from DPReview.com:
Best cameras for video

The video quality of some DSLR and mirrorless interchangable lens cameras is exceptional.

The one drawback, which may have gotten better in the last year or two, is autofocus. Even decent autofocus for video is extremely technically challenging. Virtually all professional videography/cinematography is manual focus, but doing manual focus video well takes a LOT of practice.

Camcorders typically don't actually have better video autofocus than the DSLR/MILC cameras, but they have smaller sensors, which means they have more depth of field, which means things have to be much more out of focus to be equivalently blurry.