Cashu is cool. You can do neat things with it that isn't possible with Monero, but custodial privacy can't be a replacement for non-custodial privacy. Even Calle the creator has said this.

Not only that, but because users are split up between mints, and even fractured within each mint itself via denominated token pools (1,2,4,8,16,32,etc) it also has a tiny anonymity set in comparison to Monero

Here are a few places to spend Monero if you are genuinely looking:
https://paste.sethforprivacy.com/?d7fded8661f815e0#AwcKVyVh7FXc6KJgZhqKn2f7g3iUZr7adqF9kEcSwqaV 

 when I say “places” I mean the real world. Obviously, you can spend a privacy coin in the privacy niche. But what do you get out of it beyond a hobby? 🤷‍♂️ 

 You could easily make the same argument for Bitcoin; not counting Bitrefill for various services, I have to use a Spritz card to make my (actual) money have any "inherent" real-world value.

Don't throw stones when you yourself are made of glass. 

 You think Bitcoin is “made of glass”? 

 I think the argument that Monero doesn't have any applicable real world use is just as applicable to Bitcoin, and to pretend it doesn't makes you intentionally daft or utterly delusional. 

 Bitcoin has number go up 🤷‍♂️ Monero would be cooler than BTC if it had the market cap. But would it be accepted in more places than Bitcoin is now? You don’t get a shot at replacing the reserve currency unless the governments think they can coopt BTC. Monero on its own could not do this. 

 Ecash isn't Bitcoin. Virtually no one accepts ecash. 

 Who takes ecash payment? 🤔 (ecash tokens themself, not lightning payments)
 
If Monero is niche I can't imagine how niche ecash is