DF - nice post and a good article
Currently the remedy for an incapacitated SC justice is impeachment by the House and senate trial
Alternatives would require Constitutional amendment.
The article's alternatives are not likely to survive an amending process.
we have a process in place.
Never been used to my search of history - but a remedy for incapacitated Justice exists.
Woodrow Wilson had an incapacitating series of strokes in office - and his condition was covered up
https://ahsl.arizona.edu/about/exhib...sidents/wilson
With today's intrusive media- that is not likely to happen again.
The best remedy , IMHO, - is already in the Constitution.