[xenic]

This isn’t something inherent to SPAs, though sadly many (most?) do omit the history api and don’t provide usable URLs nor back/forward navigation.

[pimlottc]

It's somewhat inherent, as the URL will not change by default and it generally takes an intentional to implement sharable URLs.

[throw10920]

"Somewhat inherent" isn't meaningful or correct. The fact is that there is a history API and you can use it to implement history for SPAs. Therefore, lack of history is not inherent to SPAs by definition. Intentionality has nothing to do with it.