testnet release and support schedule

[q9f]

• [Comms] Goerli Testnet Community Call #6 #129

• launch new testnet every 2 or 3 years, pre-announce and "end-of-life date" (5 years lifetime? tbd)
• goerli end of life: 2024?
• sepolia end of life: 2026?
• sepolia would be the right place to migrate/test applications
• sepolia is permissionless, has better stability guarantees, and better total supply

examples

• https://github.com/nodejs/Release#release-schedule
• https://ubuntu.com/about/release-cycle

[q9f]

Posted a proposal here: https://ethereum-magicians.org/t/proposal-predictable-ethereum-testnet-lifecycle/11575

Testnet	Flavour	Genesis	LTS	EOL	Status
Olympic	PoW	Q1/2015	No	Q3/2015	Dead
Morden	PoW	Q3/2015	No	Q4/2016	Dead
Ropsten	PoW	Q4/2016	No	Q4/2022	Dead
Kovan	PoA	Q1/2017	No	Q4/2019	Dead
Rinkeby	PoA	Q1/2017	1 year	Q2/2023	EOL
Goerli	PoS	Q1/2019	1 year	Q4/2023	LTS
Sepolia	PoA	Q4/2021	1 year	Q4/2026	Live
Holesky	PoS	Q4/2023	1 year	Q4/2028	Planned
TBD	PoA	Q4/2025	1 year	Q4/2030	Planned