Particle physics has been at a standstill for decades. Fusion power is still a pipe dream. Global warming continues to go on without a technological answer in sight.
False AI promises are not evidence of anything. Nothing AI is doing now is genuinely artificial intelligence. Biotech? We still can't cure cancer.
We are getting more and more evolutions and less and less breakthroughs. That, to me, is slowing down. That doesn't mean things won't get better - just not as quickly, or as thoroughly.