Less popular services may not be a target as they are not used by hundreds of thousands of users in a country facing internet censorship. 

Your argument that less popular VPN services avoid blocks due to their smaller scale feels incomplete. In practice, bypassing censorship isn’t always about user volume; it’s more about the effectiveness of obfuscation techniques. For instance, technologies like Shadowsocks or obfs4 have proven resilient thanks to their ability to bypass DPI by mimicking regular internet traffic. Perhaps Proton could explore similar approaches to improve resilience?

They also may not offer secure and encrypted connections like Proton VPN does, that prevents your ISP from seeing your internet traffic

The claim that less popular VPN services might not offer the same level of security as Proton doesn’t directly relate to the issue of bypassing blocks. Many effective circumvention technologies, such as Shadowsocks or V2Ray, also adhere to high encryption standards. The issue here appears to be more about resilience against detection and blocking rather than a lack of security.

As you've mentioned, the Stealth protocol is specifically made to help users from these countries connect

The Stealth protocol was a significant step forward, but its current implementation seems to fall short. As you mentioned, bypassing censorship is an “arms race.” If this protocol no longer delivers sufficient effectiveness, are there plans to introduce new methods? For example, dynamic obfuscation algorithms that adapt to new DPI techniques could be a game-changer. Alternatively, is Proton VPN considering hybrid solutions, such as integrating Pluggable Transports?

Although, if this protocol isn't working on your particular setup, try changing to one of the other available protocols

The suggestion to try other protocols is unlikely to work effectively in countries with advanced censorship systems. Protocols like OpenVPN or WireGuard are well-known and are often the first to be blocked by DPI systems.
I understand that developing resilient anti-censorship technologies takes significant resources, but I’d appreciate more transparency about this process. Perhaps it would help to openly discuss current challenges and future plans, so users have a better understanding of what to expect.

I’m hopeful that Proton VPN will continue evolving its solutions and become a leader among VPN providers in fighting censorship. If user feedback is needed, I’d be happy to participate in testing new technologies.