[WawaFin]

The only OEM that does officially guarantees updates support timeframes is Google

Samsung claim a support timeframe but they never released a page like Google's one (https://support.google.com/pixelphone/answer/4457705?hl=en) as far as I know

And even if we use Samsung claims as some sort of guarantee, we also need to take into account that while Google use the "at least" terminology, Samsung uses "at most" or "up to". Which basically means that they commit to nothing since a "up to 4 years of updates" (with one major update per year) could both means 1 or 0 updates or 4 updates