These are only my thoughts, based on my experience, but with possible applicability elsewhere.
For years before and post-retirement, I have been fascinated by how educational development seems to be predicated by fashions and trends.
It often seems that systems and their schools hop like frogs from the ideas inherent in one lilypad of thought to the next.
Systems and their schools seem to quickly tire of particular practices – often before they have had the chance to consolidate and confirm their benefits to student learning.
They prefer, instead, to play the game of “out with the -not so- old and in with the new”.
Education is about ‘fashions’ or ‘hobbyhorses’, and students become the guinea pigs who lose out.
EDUCATION, A LIFE FORCE 
Surely she, who has seen it all in the scholastic world, knows more than us and there must be truth in what she says.
Who knows, but fads and more fads have been educational markers for far too long.
Passing fashions are like a novelty that makes your head spin and then that’s it: when the wave of new fashion arrives, it takes away the old, like the house built on sand that collapses easily. However, when the house is built on rock it is solid, it maintains and it is like someone who bases his life on true human values: he may not speak but, with his example, he is listened to, gets results and is followed, because he is authoritative. Go Henry 🙏