A couple of 'leaks' are indicating The Open is reducing the number of playoff holes from 4 to 3 used in the cumulative scoring this year, if needed. That isn't a big change but brought back a flashback for me.
2009 - Tom Watson failed to make par on 18 and win the tournament outright, and thus at age 59 the oldest to ever win a golf major. He then was in the 4 hole playoff with Stewart Cink and obviously gassed, was throttled easily. I remember hurting for Tom but was consoled he lost to another good guy from the USA.