That’s an interesting question. We have a Data Quality Index (DQI) sheet at the VEEEERRY end of that spreadsheet, that explains how we score data.
On some level, it’s up to our discretion to decide how “technically representative” an LCA is. And some priority is given to the “temporal representativeness” (or “freshness”) of the data. But perhaps once we have more data about the ages of devices brought to events, this can be changed. For example, we might find that hifi components are an average of 15 years old.