I understand PHP has had many criticisms in the past but I'm not sure the existence of dynamic properties of instantiated objects was ever one of them. In fact, dynamic properties are pretty much the hallmark of most interpreted or dynamic programming languages. Python allows it all the time and so do many others like Ruby, Perl, etc.

I don't know what PHP developers achieved by removing dynamic properties feature from the language but one thing that resulted out of this is that many applications based on widely used veteran PHP frameworks (such as CodeIgniter and CakePHP) came to a halt all of a sudden due to an error like this after upgrading to PHP 8:

A PHP Error was encountered
Severity: 8192
Message: Creation of dynamic property CI_URI::$config is deprecated
Filename: core/URI.php
Line Number: 102
Backtrace:
File: C:\xampp\htdocs\inv_perpus\index.php Line: 288 Function: require_once

The influence of Corporate IT in various open source foundations is pretty well known and also well known is the extent to which corporate greed goes to achieve its interests and objectives across the world. The only way to assuage this uncomfortable thought (at least in this particular case) is to ask if there was any technical merit at all in removing dynamic properties feature from a dynamic programming language?

I for one couldn't find any such merit here.

I've been looking around online at compatibility for HTML5 browser streaming. It looks like straight up AV1 in a MP4 container is becoming absolutely fine for browser playback on devices.

Is anyone using this on webpages yet? The sooner we move to AV1, the sooner we can have high quality video stored at smaller file sizes, which is a massive bonus.

Right now my company video hosting is purely in MP4 with H264, moov atom to the front as per the requirement, and it plays back on everything with no fallback in a straight HTML5 video container. What's the chance of switching to AV1 and not having to worry about the fallback for the most part?

Edit: I should have used a better title. I used FFMpeg for MP4 and AV1 creation/encoding. This is more about HTML5 video container code and direct AV1 file playback.