They still have some specific use cases where they aren't obsolete. For example I've worked at several law firms and every one of them had at least one office typewriter. They are super useful when you're working with older documents and want the additions to look professional and consistent. For example I once worked on a complex stock reissue where I was working with 100 year old stock certificates. Typing on them was muuuuuch faster, easier, and cleaner with a typewriter than trying to line up the old certificates in a laser printer

Five years later, the facts on the ground have finally changed. I no longer believe that this bargain is worth it for most new applications.

Lately I've been much happier working with ROM, so it's just as well that Rails is obsoleting this gem.

It is a stepping stone towards ES7 async/await.

most recently the release of ActiveStorage in Rails 5.2

It will be useless work when gvfs-open will solve the bug, but in the meantime...

L'effectif des Ulis école, comptabilisé séparément des autres élèves de l'école pour les opérations de la carte scolaire, est limité à 12 élèves

This game runs on Flash. Effective Jan. 12, 2021, Adobe (the company that made Flash) began blocking its use everywhere. This is unfortunate, but outside of Kongregate's control.

By explicitly defining the form layout using ::property there is no more need for protecting from unwanted input. strong_parameter or attr_accessible become obsolete. Reform will simply ignore undefined incoming parameters.

First, the frame and frameset elements are not deprecated in HTML5, they're obsolete (i.e., they've been removed entirely).

Single-factor authentication based on "something you know" (e.g., a password) is no longer an acceptable best practice. "I'm pretty well convinced passwords are a horrible system," Professor Douglas W. Jones of the University of Iowa, says

Another problem with simple login-based authentication is that there is no way to control how much access an individual third-party application gets: it's an all-or-nothing deal based on whether you are willing to give the program your password.

When third-party software runs amok with your login information for a Web application, the only way to stop it in some cases is to change your password

One article even proclaims the death of passwords for gaming apps because of this new trend. This could signal a big change for security (assuming every user has a mobile number).