Changing in mid game is somewhat risky. Bad snaps, offsides, motion violations are all the things that typically follow a midgame change. All the critics see are the hypothetical upside, because Alex has not shown anything to make anyone think he's better than Spencer. Alex might be better but there is no visible evidence to that effect. The critics can afford to trivialize the downside because its an academic question; but for the coaches its a very real question because they have to live with the downside. The coaches see them everyday so perhaps we should defer to the people that have seen both Alex and Spencer play since we haven't seen anything from Alex .
Now, 2021 will be a different proposition. Surely this covid hysteria will begin to quiet, although we're hearing from Democrats the continued need for highly limited contact and masks may never end so there is the possibility of banning spring and summer camps. Considering that risk unlikely, Spencer will have the full benefit of winter film study, whatever workouts are allowed in the off season and spring and summer camp, plus 8 starts, the level of play we saw this year will not be acceptable next season and I'm betting there was probably a fairly frank conversation to that effect at the end of the season.
My sort of semi informed guess is Hogan passes Alex, Alex transfers down for PT and Hogan jumps Spencer if we see the kind of mental errors and wild throws we saw last season.
But....every season a lot of us make a wildcard kind of prediction. Mine for 2021 is the wildest yet. Joey Labas finishes the season as the starter. It goes against almost every Kirk Ferentz tendency. You can tell from his tape that Joey is much faster than Spencer or Hogan (forgot his first name, duh), appears to see running lanes open and shoots through while having a good passing form in the pocket. The run pass option that presented in the new offensive environments. Ricky Stanzi has been tutoring Joey for 2 years. That gives the kid a huge advantage in already knowing how Iowa expects him to read defenses, go through the route progressions, etc... If he's up to the speed of the college game, it might be the Iowa out of nowhere QB that becomes the big story.