Whatever &quot;support&quot; means for an open source system, but is it recommended and is it well tested? The official documentation said &quot;don&#x27;t upgrade, do a clean install&quot;. That alone made me not consider it at the time.<p>Three and a half years of support is impressive for a community project and I wonder how they manage. However that matters little for a consumer operating system if you can only do n+1 upgrades anyway. What matters is that upgrades are automated and well tested.