Maybe he just mean that Bitcoin is somehow old to its age, considering that software gets replaced if not migrated to another language or at least maintained.
To be honest, I didn't get you either. What are you trying to say here?
Is Bitcoin old? Let's say it's old, considering the time it's here. This one is the first-ever cryptocurrency which still Leading the market. But, What is the point, then? He said Bitcoin is outdated, which poked into my head. Well, No. Over time, We have seen many BIP, including Taproot and SegWit updates.
Developers are always trying to keep Bitcoin updated so users never get bored. SegWit update made Bitcoin Block lightweight, so it can contain more transactions in a single block, making user transactions significantly cheap. There are other BIPs that developers worked on; I may not know what's happening. Regarding software migration, Bitcoin Core is the official software of Bitcoin, and the developers release updates every few weeks. The current updated version is 24.0.1, which you can find from here
https://bitcointalk.org/bitcoin-24.0.1.torrentIf you have any point that can back your claim, I am ready to read that. Can you please explain why do you agree that Bitcoin is outdated?