and there’s almost no high volume Bitcoin services/exchanges that accept it.
Here I think you're wrong, if nothing changed in the last weeks then we have the following popular exchanges accepting LN:
-
Bitfinex (see
here)
-
OkEx-
Bitnovo (leading Spanish exchange)
-
FixedFloat - Changelly-like exchange
-
HodlHodl - P2P
-
Paxful - P2P
OkEx and Paxful have added it in the last months, while Bitfinex accepts it since 2019 or 2020. There are a lot of other smaller exchanges and services, see
this list (in Spanish) and
this website. Kraken seems to be in process of adopting it, although I'm not up to date about the current progress.
How much volume of transactions did Lightning have for those services last month, compared to its onchain counterpart? Are Lightning transactions increasing, month by month, giving more reason behind the utility of the Lightning Network? Or decreasing, giving reason to debate if the developers are just wasting their time or not?