[amanj41]

I would not say it is correct to call BTC deflationary. It is simply not inflationary after the final halving. Since USD is highly inflationary then BTC is "deflationary" w.r.t $1, but the supply of BTC does not shrink.

You could argue about people losing their private keys being deflationary, but that's still different from blockchains like Ethereum whose currency is literally burned in small amounts during block creations (and therefore has the chance to be truly deflationary at times).

Aside from that your other points are valid.