Anyone ever work with time locked transactions ? I mean, other than lightning and Blockstream green?

It seems to me the biggest unaddressed need in bitcoin is hardware wallet integration / verification of time locked transactions…especially in the style of the Blockstream green multisig where #of signers decreases over time.

Maybe nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8 has an idea? What better security could you have other than the complete inability to spend?

Or does RBF make this security moot?