Under the rangetop is a common place for a warming drawer, and one where it is likely to get a lot more use than some others. Another good place, better for some, is right next to it. I don't know specifically about the Wolf, but in general, warming drawers don't get very hot. Mostly, you'll have it on less than 200° F, most often, significantly less, since you'll be mostly warming rather than cooking. I think the handle would be more uncomfortable than the heat. I've never heard a complaint about that from others whose warming drawers are in a similar position.

If there's a fan running to cool the electronics, get a different warming drawer. Some can be paneled to match your cabinets if your choice is based on looks. I chose one that doesn't have any digital controls. It has an on/off switch, an on light, a lever which opens or shuts vent holes, and a lo/med/high dial which regulates the amount of energy that goes in, rather than a particular temperature. It's very simple, silent, except when empty and the heat makes the floor of the drawer pop, and undemanding. The vent holes are for when you want the steam to exit, like when you're keeping waffles crisp. It's panelled, and you can barely tell it's warm, though it's not under the cooktop and I don't stand in front of it. I wouldn't like one with a fan that was whirring and venting heat.

Do you mind if I ask which warming drawer you went with?

Not at all, but keep in mind that this was six years ago and models have changed. I wanted one with a wide temperature range. That is, a low under 100° F. for plate warming and dough rising, and a high over 200° for holding a dense pot at piping hot (at that temperature it's still cooking, slowly, so good for stews and the like, not for roasts). I also wanted a cabinet panel and a lever vent. Originally, I was going to give up the panel to get the open sides of the Gaggenau, which matched my ovens, though wouldn't be stacked with them. There was a huge price hike, though, and I decided on the Monogram, which had all the features I wanted, including the panel, plus a free standing partial rack for extra plates and a free set of rails with buffet warmers, just not the open sides. The sides have never been an issue. 30" is wide so getting things in and out is really easy. And warming drawers really don't get hot enough to burn if you touch them.

I should have said above, "if there's a fan running to cool the electronics" and it's going to bother you, to get another model. It might not bug you at all, though I see the potential. And I don't know if it vents to the front rather than into the cabinet, if it exists at all.

Before you make any choices, do try to see some in showrooms where they're operational so you can get a sense of how it really works. If that's not possible, read the manuals and keep asking more questions.