In light of renewed aggressions from powerful states, the only recourse smaller states have to defend themselves is to turn themselves into a fortress like Taiwan (which is prohibitively expensive for most larger states) or nuclear deterrence (which Ukraine gave up for false guarantees of protection from invasion). Guarantees aren't what they used to be, and I wouldn't be surprised if many waning US allies are covertly developing nuclear capabilities.
I hope my state is because the alternative is being at the whim of the powerful nuclear states around us in a political climate of rising authoritarianism.
Ukraine was never a nuclear power any real sense. The USSR's bombs were parked there, and Ukraine merely had physical (but not operational) custody over them after the USSR fell. Ukraine could have kept them to bootstrap a nuclear arms program, but they didn't, so they were never had a nuclear deterrent to give up in the first place.
Taiwan isn't much of a fortress. The Nordic states are probably better defended than Taiwan.
Ukraine never had the possibility to keep its nuclear arsenal, they simply didn't have the infrastructure for it, let's not pretend they had any real choice.
> Guarantees aren't what they used to be
Anyone that has read history knows that state leaders' promises are written in the wind. Throughout history, states have traditionally behaved like dishonorable people, because their leaders have been traditionally dishonorable. It's as if it was almost a requirement, no matter the form of government.