vmiaptetr said:
I got a 48" range, but everything listed below would be on the 36".
1. The star burner. It really does provide more surface coverage when heating the pot/pan.
2. The Extra Low Simmer. The burner can cycle on/off to get an incredibly low simmer. No way you'll burn your food, and you can hold a precise temp when waiting to serve. A 36" should have this in all burners, so you can hold the temp for multiple dishes.
3. The extra high burner. You'll probably have one. Honestly, all burners are going to burn hotter than a range you would purchase from Lowe's/Home Depot. One burner will be exceptionally hot. If you think you'll need more than one, go with the Blue Star mentioned above.
This is not a complaint, but that large oven on a 36" will probably take a while to pre-heat. We have dual fuel, so maybe it's just because the oven is electric that it takes longer to heat. Not sure if you are going all gas.
ETA: 4. The burners are raised, so it's easy to clean underneath/around them.
I had a 48" Thermador in my last house (installed in 2015 or so), and didn't like the star burners, though they were the main reason I bought it. The flame wasn't evenly distributed around the star, with the points sending more gas out, and sending more of the flame out wide than I'd hoped. On the highest setting, it sent a lot of heat past the edge of even my largest pans, and would heat the handle a ton as a result.
The cooling fan for the oven was super loud, and I hated that. Took forever to cool down and turn off after cooking. The in wall ovens at least aren't as loud now - not sure about their ranges.
Currently building, and we're putting in a Thermador in wall oven with one steam, one standard (loved the steam oven I had on the old one). We're doing their induction cooktop in the island, because my wife really wanted to put a cooktop there, so I acquiesced.