Even though Selenium IDE offered ease of usage, it had a lot of issues, it had no support for cross browser testing, running parallel tests, and more. This is the reason, when development for Selenium IDE stopped in 2017, a lot of testers were under the impression that Selenium IDE has died.
But this has changed recently, as Selenium IDE has gained traction once again and its usage is gradually increasing. The reason? Selenium IDE has overcome its previous limitation and now supports cross-browser testing, parallel tests, and a lot more!