That was the case in my tiny little niche (there are 4 of us, plus an occasional broad-match interloper), until this month. Now I'm checking daily to see which keywords have gone inactive, and which increased-bids-to-reactivate I can lower. I'm hoping that things will get back to normal soon.
I think one thing that threw my campaign off was pausing everything except a seasonal ad that I expected to have a lower CTR but higher conversion. So maybe I *should* have just set it and forgotten about it!