Just came to this thread to post that I've managed to get a pre-order in! So interesting to read. Just had the confirmation email come through in the last few minutes.
I have been checking casually Amazon & Nintendo UK Store and hopefully my new pre-order will stick. I have noticed in the past few days the Switch 2 appear for pre-order at Amazon 3, or 4 times but it always fails when trying to place the order. Then the price disappears etc. So I wonder if people are cancelling pre-orders, or generally this thing is going to be in reasonable healthy supply/resupply.
I'd previously managed to pre-order the Gamecube controller weeks ago when that first open to general public. So just the Pro 2 controller left to buy if I need it. I suppose screen protectors and stuff as well.