Cost? It's not much - Swisscom charges only 10 CHF/month more for it, but I stuck with 1GBit because basically nothing I do is bottlenecked by the ISP at this point. It's all latency or upstream/peering bottlenecks. There's no point in spending more money to open a huge pipe even wider if you just hit a smaller one further upstream.
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Meanwhile I have 10Gbit here in Zürich.
What's the point in having less?
Cost? It's not much - Swisscom charges only 10 CHF/month more for it, but I stuck with 1GBit because basically nothing I do is bottlenecked by the ISP at this point. It's all latency or upstream/peering bottlenecks. There's no point in spending more money to open a huge pipe even wider if you just hit a smaller one further upstream.