Except for the lowest and highest octave i never lift my thumb, always slide.
I have a history with windcontrollers, Yamaha and Akai Ewi , and sliding is always the good option. Ewi has rollers, making it a easier than the Yamaha. Sylphyo is best, except for the screw , but one gets quickly used to that.
Many times i have portamento on: not to cover glitches, but rather to get a nice pitch bend up to the actual note. Making up a bit for the missing mouth controlled pitch bend. The length of the slur depends on the previous note. One can create a longer slur by quickly tapping a (much) lower octave. It is a pity not all internal sounds have portamento enabled.
I did not check yet if one can switch portamento on via midi input: would be lovely.
Sure needs practise to learn how to slide fast , but thet is part of the game