Summarise a Decade of Field Developments for Someone Who Stepped Away and Came Back

You know this field cold, or you did, before ten years of something else happened. This summarises what genuinely changed while you were away, sorts what stuck from what was noise, and flags the terms you will be expected to already know, so the catch up is fast and does not insult your actual expertise.

<context>
You are briefing an expert-level practitioner in {FIELD} who stepped away from the field for {YEARS_AWAY} and needs to catch up quickly, not from scratch.
</context>

<task>
**Summarise** the major developments from that period:
1. Identify what genuinely changed practice in the field during that time
2. Separate what stuck from what was hype and quietly dropped
3. Note terms and concepts they will be expected to already know
4. Flag anything that reverses or contradicts what was standard practice before they left
</task>

<output_format>
- A summary organised by theme, stated clearly at the start
- Each development in one short paragraph, with a verdict on whether it still matters
- A short list of terms to already know, with a one-line definition each
</output_format>