[divyekapoor]

After building embedded library codebases that have had version skew across clients (sometimes over several years worth of code), the library approach just stops evolving after a certain point - the backward compatibility mess is a drowning morass. There is no control on the upgrade cycle, old infra can't be turned down, performance is a risk, upgrades are a risk, every deploy has "foreign code" and the potential for a dependency mismatch. Services work - use them. Unless performance is of the utmost concern, say no to libraries.