I love these arguments "You know, we thought we couldn't cross the ocean, and now we did!"

This means we can just jump over to mars, then explore other planets, etc, etc.

We know tons of regimes where there is non-continuous progress. Finding a smart dude with an anecdote does not invalidate the breadth and width of all human experience with non-continuous systems.

Some dude thought all fluid was newtonian, and then we discovered non-newtonian fluid. It does exactly what yuou don't expect. Which basically demos physics is complex but that still doesn't mean progress is fluid.