Mostly the old guard who doesn't want to adapt to induction ovens and Döner Kebab shops where there really is no replacement for a proper gas grill.

At least here in Europe, many restaurants are switching because the writing is on the wall that natural gas will get very expensive very soon.

So soon it that became expensive since the last year or so

Sure, but all actual bans in the US so far have made exceptions for commercial kitchens.