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I not entirely 100% sure, but from my understanding, over-time is gets better the more people that use it and transact in it. So it gets cheaper to send transactions, it gets more anonymous they are upgrading from ringCT16 to full dev mode which goes up to 100,000. Its a new development, so I'm a bit unfamiliar with this so don't bite my head if I'm giving you wrong info.
right now, to send a transaction to you is at most $0.01 if high high priority. but often times it less then a penny
this territory is moderated
Everything you said is pretty much correct. The RingCT upgrade is called Seraphis btw, which basically makes your transaction potentially part of any transaction on chain. Can't understate how massive an improvement this will be.
There are a lot of other benefits like forward secrecy, better viewkeys, multisig, etc and cleans up many other smaller and larger issues Monero has