Paper money has existed for thousands of years, first widely used in feudal China, although continuously improved and renewed, they have not disappeared a single day in the past 1000 years. So thinking about a future without paper money isn't going to happen anytime soon. CBDC will soon be created and adopted but it also cannot completely replace paper money, there are still many places, and many people still don't know how to use the internet as well as the phone, how can they use CBDC?
It's hard to make people change their use of paper money, when it's been around with us for thousands of years. If credit/debit cards didn't manage to replace paper money, then how would CBDCs succeed? Yet, I think this time will be different as the pandemic and certain other factors will force us towards the complete digitalization of our society. Phasing out paper money would bring many benefits to the government including (but not limited to) reducing waste, eliminating privacy, and having better control over the money supply.
I know the world is going to abandon paper money at some point in the future, especially when central banks are announcing their intentions of launching CBDCs to the public. But this is going to take quite some time to achieve, as there are a lot of people who won't abandon paper money that easily (especially old people). We already have Bitcoin anyways, so there's no need to wait until Fiat becomes fully digitized. Just my opinion