Congestion avoidance (after slow start) has multiple algorithms (CUBIC, BBR, Reno). Choice matters.
A British IPTV reseller whose stack uses CUBIC (modern) or BBR (cutting-edge) performs well. A British IPTV provider still using Reno (legacy) is behind.
Here's the performance difference: CUBIC handles high bandwidth better than Reno. BBR handles variable networks better than CUBIC. The IPTV reseller UK who chooses appropriate algorithms respects that one size doesn't fit all. One with Reno is using 1990s technology.
In most cases, what actually works is asking about congestion avoidance algorithm during trial. "CUBIC, BBR, or Reno?" BBR/CUBIC = modern. Reno = legacy.
Scenario: high-bandwidth network. Reno may struggle. CUBIC handles it well. Variable network: BBR handles better than CUBIC.
I've watched an IPTV reseller UK switch from Reno to CUBIC to BBR over time. Performance improved with each upgrade.
Honestly, ask about congestion avoidance. A British IPTV reseller UK using BBR or CUBIC is modern. One using Reno is outdated.
A British IPTV reseller who uses modern congestion control respects that 1990s algorithms (Reno) are obsolete. Upgrade for better performance.