Getting a button to appear in ExtJS ain't the problem. Getting it to appear where you like often is. Comapared to nested panels with umpteen different layout ma

Getting a button to appear in ExtJS ain't the problem. Getting it to appear where you like often is. Comapared to nested panels with umpteen different layout managers, flexbox ain't that hard (nevermind subtle cross-browser bugs that aren't priorities in Russia when compared to spurious pivot table features). And let's not even get into customizing. Attaching CSS rules to four different generated nested divs, inline style declarations to both the object and its underlying element, custom XTemplates... Abstractions get leaky rather fast, if you're not doing the "3270 terminal forms meet Excel 2003" enterprise UI.