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Thanks for the info, but it seems to me like still only a roadmap, IBM marketing blabber, vaporware until it's actually there and working as advertised. I'm not qualified to judge if they can hold the timeline.
While we phantasize about still fictional QCs large enough to be able to attack Bitcoin, more likely earlier able to attack crucial encryption technology of global internet, transaction fees are still pretty low.
We occasionally have partially full blocks, i.e. you could've transactions confirmed that pay a fee rate as low as 1 sat/vB, if you're not in a hurry (should easily become confirmed latest within a week, usually way less than that from what I see looking at past blocks of few recent days). Mempool situation is remarkably chilled these days, quite a joy for transaction fee penny pinchers.
I believe it's something they can achieve if they want to do it since everything they needed to execute the quantum computer resistant is already finalised, and we also have platform like Quside, working on strongest cryptographic base for a lifespan of security which IBM and others can also learn from their research.
Having said that, QC won't attack Bitcoin but it will be use to attack Bitcoin wallet entropy especially the exposed public keys and it will be use in mining to find the next block early.
