Of all the lists we do each year, this one that ranks tech companies by number of local employees provides perhaps the most insight into Austin’s new economy. These companies pay big salaries, a blessing and a curse as affordability deteriorates. They eat up tons of office space and housing, demand bigger roads and better schools, and further shine the spotlight on Austin in a way that beckons other to come here — and with all of that gain comes a lot of the pain Austin feels now.