When ESO launched I was adamantly opposed to addons. I argued that it was a cop-out for the developers, who could then ignore UI issues and pass the work on to voluntary contributors. Some 6 months later I caved and started using them because ZOS made it clear they weren't going to do their job, proving my point but leaving me with the choice to gimp myself with a weak default UI or use the addons I had decried.
To be fair, some things have been improved, namely the default guild store UI, or floating combat numbers. Those were important changes, but they also came years too late. I still think the game might be better with no addons because that would force ZOS to address their shortcomings and would leave everyone (namely PC/Mac and consoles) on equal footing. Never going to happen, though.