• Previously contentious bits
• Constructor vs. createdCallback
• Symbol-named properties for lifecycle hooks
• Calling attributeChanged for all attributes on creation
• Contentious bits
• The general timing of lifecycle hooks
• The specific timing of the constructor, and the consistent world view issue
• Attached/detached vs. inserted/removed hooks
• Other things to work out
• registerElement or something new?
• A solution for the style="" attribute spamming
• Other issues worth mentioning