Make TTI metric a bit more past tense (#37098)

files/en-us/glossary/time_to_interactive/index.md

@@ -8,13 +8,14 @@ page-type: glossary-definition
 
 **Time to Interactive** (TTI) is a non-standardized web performance 'progress' metric defined as the point in time when the last [Long Task](/en-US/docs/Web/API/PerformanceLongTaskTiming) finished and was followed by 5 seconds of network and main thread inactivity.
 
-TTI, proposed by the Web Incubator Community Group in 2018, is intended to provide a metric that describes when a page or application contains useful content and the main thread is idle and free to respond to user interactions, including having event handlers registered.
+TTI, proposed by the Web Incubator Community Group in 2018, was intended to provide a metric that describes when a page or application contains useful content and the main thread is idle and free to respond to user interactions, including having event handlers registered.
 
 #### Caveat
 
-TTI is derived by leveraging information from the [Long Task API](/en-US/docs/Web/API/PerformanceLongTaskTiming). Although available in some performance monitoring tools, TTI is not a part of any official web specification at the time of writing.
+TTI is derived by leveraging information from the [Long Task API](/en-US/docs/Web/API/PerformanceLongTaskTiming). Although available in some performance monitoring tools, TTI is not a part of any official web specification.
 
 ## See also
 
 - [Definition of TTI](https://github.com/WICG/time-to-interactive) from Web Incubator Community Group
 - [Time to Interactive — focusing on human-centric metrics](https://calibreapp.com/blog/time-to-interactive) by Radimir Bitsov
+- {{glossary("Time_to_first_byte", "Time to first byte (TTFB)")}}