We have been thinking to switch from classic experience to the modern one.
One of the reasons is the bulk edit.
Can anyone list the pros and cons of these two?
You can use Quick Edit/Bulk Edit in both Classic as well as Modern experience in SharePoint Online.
However, you can find the differences between Classic and Modern Experience in below articles:
At the end, the choice of classic/modern is depend on the features you are going to use from those experiences.