I play the Yamaha stereo piano voice 85+% of the time utilizing the sustain pedal constantly all that time too,
but I suppose, unlike you, I'm not willing to tolerate standing because it requires balancing all my weight on my left leg the entire time (hardly a natural position), and without any opportunity to switch back and forth between the 2 feet, because I use my right foot exclusively for triggering the sustain pedal or to trigger the fill to self assigned pedal, and leaving my left foot to trigger the vocal harmony on/off assigned pedal.

Even if one is actually able to balance and maintain their entire weight on their left foot all evening (as Fran C. does),
I can't, perhaps because I've never had ballet lessons

But even if I could, this would eliminate any possibility of the left foot available to activate another pedal, while at the same time needing to activate the sustain pedal with the right foot.

For these reasons, I sit on and or support my upper body weight on the edge of a high stool freeing 'both' feet to activate the sustain, and other pedals at will. More important is the health benefit of a 'pain free' fully supported & ergonomically balanced upper body, yet still affording the keyboard positioned higher than the traditional seated kb position for improved audience visibility. I recommend this healthier compromise keyboard height position approach. JMO.