These are channels and groups with thousands of members. https://t.me/durovschat https://t.me/durovschat Has 9500 members https://t.me/swhkdemocracy https://t

These are channels and groups with thousands of members. https://t.me/durovschat https://t.me/durovschat Has 9500 members https://t.me/swhkdemocracy https://t.me/swhkdemocracy Has 6000 members https://t.me/linux_group https://t.me/linux_group Has 6000 members https://t.me/PublicTestGroup https://t.me/PublicTestGroup Has 18000 members There is no limit to joining these chats. These design decisions Telegram has picked has allowed the app to be quasi social media, rather than just IM. You can't index these and maintain chat history locally. You'd need way more bandwidth and energy and computational power than the average cellphone has.