That's good. And I would have loved to see you start with that. There are plenty of people on this forum trying to spread FUD on various topics, including this one, and one of the methods seems to be by asking "innocent questions" like this.
I don't feel the need to preface every question with a reinforcing statement for Bitcoin. If you think it's FUD or that I'm asking "innocent questions" with alternative motives, that's your interpretation. Seeing useful replies with counter-arguments to the initial questions will itself remove FUD.
It's as simple: underlying hardware is advancing, getting bigger and cheaper, hence if this is not a big problem now, it should also not be in the future.
Agree that hardware is advancing and getting bigger. So is the size of the blockchain. The question then becomes the relative rate of increase. The graph in the link below shows the increase in the size of the blockchain over the last decade.
In 2015, it was around 40GB. It is now over 300GB. My computer has a hard drive with 500GB. While I would've been happy to download the block in 2015, it is now too big for me. Yes, I could easily fork out another $100 to buy a new hard drive but this is something I would've have needed to do a few years ago.
https://www.statista.com/statistics/647523/worldwide-bitcoin-blockchain-size/