Unfortunately my
*istD cameras, with their CCD sensors, (which are quite sensitive to I/r without any modification), don't have LiveView, so I revert to "old-school" procedures and use the i/r index regularly.
I do find having a "square filter" holder fitted to the lens, so's the filter can be slipped in and out quite readily, to be a great advantage.
Older primes, the sort of lenses which are likely to have an I/r index, fortunately often have smaller filter threads, so there's no massive investment necessary in large filters and the screw-fitting ring can be swapped on the holder as necessary
For the (attempted) capture of a moving subject within a pre-framed scenario, or even as a "walk-around" snapshot camera with the lens pre-focussed at the hyperfocal distance, a separate wire-frame or optical viewfinder fitted in the hot-shoe can be very helpful