Martin Fowler
co-author of the Agile Manifesto
Martin Fowler is also Chief Scientist in ThoughtWorks, so you can imagine that the view of ThoughtWorks on SAFe, also documented here, is congruent with his view.
During a panel at the GOTO conference, he made very clear his dislike for SAFe.
References:
Last modified October 6, 2022: Fix SAFe links (45cdbde)