While it's smaller than what you'd need for a 100 watt HF rig, I've got an Astron SS18 switching supply that has been running 24x7 since February 2003. Originally it ran a couple of receivers in a dispatch center. Now it's running a CDM-750 as a base application.
No noise on VHF, never tried it on HF.
I think a few years ago I blew the dust out of it, but that's been the extent of the maintenance.
Used to be that switching power supplies were noisy, but if you get a good name brand, you're OK.
That means no e-bay/Chinese specials. For this application you need something good. Stick with a known name brand, like Astron and the like.
As for the linear versus switcher debate…
At work I run a large frame PBX system in addition to several radio systems. 20 years ago everything was large and heavy linear supplies. They worked but they generated a lot of heat, had lower efficiency, and were really heavy (I'm talking about units in the 200 amp and up range). Since telephone systems need really clean DC power, it was important to have very low noise power systems.
Over the last 20 years, -everything- has gone to switching power supplies across the board. What used to take up an entire 7 foot tall 23" equipment rack now fits in a couple of rack units. These systems are very quiet, and many that I have have been running for 10 -15 years.
Linear supplies are great if you can get one. But expect some heat and weight to go with it. Not usually an issue for most amateur operators.