I love the idea of this: that there is a place you could go to get a pulse on the opinions of technology professionals regarding the tools they're working with.

So I apologize for the negativity that follows; it's a cool idea, and you've put work into it and made it look very pretty. That being said: unfortunately, without it being backed up by _data_, this is just one person's opinion and ultimately not very worthwhile as is.

Furthermore the presentation of the data along a single axis 'adoption' (or sometimes 'expectation') is even more confusing. Technology comparisons are not helpful plotted on a single variable as the comparator. It also leads to some very bizzare plots where somehow 'mariadb' has more 'adoption' than 'mysql' or 'postgres'