Has root canal technology improved? The pain is...

‌I am on my second root canal session,
and the first day was quite painful. Even though they administered anesthesia, it still hurt.
That specific feeling of cold sweat when they touch the nerve during a root canal... I felt that about 2 or 3 times??
Compared to before, the frequency was significantly lower, though..
Today was my second session.. and I went in feeling quite scared;
But, even though they used anesthesia again today... there was absolutely zero pain today.
The dentist told me they would help me endure it well since I'm a good patient..
Well.. since there was no pain;; there wasn't even anything to help me with;; lol
Why is this happening?
I had a root canal done a long time ago.. back then I had to go about 4 times, and it felt like I was dying of pain every single time lol
Has the anesthesia technology for root canals improved?
Also, my tooth looked fine on the outside, but they said the inflammation at the tip of the root was severe, so I had it extracted and got an implant.
During the implant procedure.. there was truly zero pain throughout the entire process.
It seems like pain management in dental clinics has improved a lot. When I was a kid, I thought I was going to die of fear every time I had to go to the dentist.
Now, I feel like I don't have to be so terrified of going to the dentist anymore...