I never had a problem with the website of my Finnish bank 20 years ago. And I could order my plane tickets too through the Web in the first half of the 2000s.
I cannot say the same of the website of my French bank and its multiple rewrite over the last 8 years, which still provides less features and make them harder to reach each time.
Or the website of the national lottery and its countless rewrites, each of them getting slower, more inconsistent, and displaying less information on each screen.
Or the website of the national weather forecast, which gets worse at each iteration: now there's a 'weekly' view that shows 5 days; and I cannot for the love of God find the curves of snow and other parameters from the automated altitude weather stations any more (at each iteration, they have become harder to find, but with last iteration there is no access any more; someone's got direct links to the pictures URL on a website, but for how long?). Each time they make an update, the site is completely broken for days or weeks, before they sort out their crap and return the new shit to a more functional state.
Or the website where I did put my bicycle recordings for years without a problem and without feeling the need for any extra feature, which all of a sudden cannot be displayed any more by my old browser.
In all those cases (except the last, which is probably more recent), the needed features have been implemented for at least 15 years. They were working 15 years ago. Yet they got rewritten multiple times, and not for the best. Oh yeah, sorry, for the weather forecast website (which is a public service belonging to the legal type which is the most integrated with the State), there is a new feature added at each iteration: more advertisement, and now more tracking too! The site has become unbrowsable without and ad blocker.
And BTW now, I am met more and more often with the infamous "your browser is not compatible with this site, please update to Chrome / Edge / ..." messages. I thought this kind of things were dead and buried. They were dead and buried, for 10 or 15 years, but now dreadful times are starting again and they rise from their grave.