There is an airline that strongly encourages pilots to take a highspeed exit at an airfield into which I fly regularly. This is to shorten taxi times by a minute or two on as many flights as possible to save fuel and allegedly provide the base captain with an annual fuel saving bonus.
In terms of performance, you usually need a higher flap setting with its related higher drag and fuel burn, and taking the exit relies on the length of the highspeed exit being incorportated into the landing roll which I regard as poor airmanship. And then there's the terrifying experience for the pax of braking hard, which is reprehensible.
After vacating the runway and giving each other smug high-fives, you will be held on a taxiway due to an occupied stand or arrive abeam your stand and wait for up to 15 minutes for a ground crew, merrily burning fuel all the while.
I'm in favour of good practice leading to fuel savings, but joined-up thinking is needed.