I still don't quite understand technically what the limitations of Bitcoin's smart-contract are compared to Ethereum. Is this still the case or not with Lightning Network or possibly another L2.
If you have any resources to deepen this topic I'm interested, thanks
Bitcoin has a limited scripting language in which security is prioritized over programmability.
There are smart contract sidechains, including Rootstock (which is EVM-compatible). The Liquid network sidechain has smart contracts which are used for asset issuance and governance. Stacks is a blockchain that ties its concensus to bitcoin and has smart contracts. RGB is a layer2/layer3 technology that provides smart contracts, to some degree. Even Lighting network can be described as using "multisig smart contracts".
Here's an article that discusses the scripts and smart contracts available with Bitcoin:
What Are Bitcoin Smart Contracts? https://river.com/learn/what-are-bitcoin-smart-contracts
And here's one other article:
5 Projects Enabling Smart Contract Development on Bitcoin https://cryptonews.com/exclusives/5-projects-enabling-smart-contract-development-on-bitcoin.htm
All of these have posts with discussion here on SN.
Thanks buddy
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The first is RGB https://github.com/RGB-WG/rgb-core The second, that has copied RGB, is TARO : https://bitcointalk.org/index.php?topic=5393585.0
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