I updated all my extensions to mv3 and I regret it. Sales dropped and a lot of reports that extensions stop working, even after restarting of browser, some users must reinstall it each day to make it work.
Some of customers still use old browsers which don't support mv3 but got updates, so they notice extension is not working and I receive refund requests or disputes. My refund request rate was 0.9% and now it's 3.5%. So, I suggest to keep mv2 until mv3 is completely fixed, probably in a year :/