I am wondering when we can drop support for g++-8. All supported operating systems, except for CentOS Stream 8 offer a greater version:

* Ubuntu Focal: gcc 9 (https://packages.ubuntu.com/focal/gcc)
* Debian Bullseye: gcc 10 (https://packages.debian.org/bullseye/gcc)
* CentOS 8 Stream: gcc 8, with EOL of " May 31st, 2024 " (https://www.centos.org/centos-stream/)

The rationale for dropping it would be that there are currently occasional compile failures with perfectly valid C++-17 code, for example:

* `error: call to non-‘constexpr’ function ‘void __assert_fail(const char*, const char*, unsigned int, const char*)’ assert(false);` (https://godbolt.org/z/bxaMnfcsa)
{
        assert(new_state == State::COMPLETED || new_state == State::CANDIDATE_DELAYED);
        assert(it != m_index.get<ByTxHash>().end());
        if (it->IsSelected() && it != m_index.get<ByTxHash>().begin()) {
            auto it_prev = std::prev(it);
            
            
            if (it_prev->m_txhash == it->m_txhash && it_prev->GetState() == State::CANDIDATE_READY) {
                
                Modify<ByTxHash>(it_prev, [](Announcement& ann){ ann.SetState(State::CANDIDATE_BEST); });
            }
        }
        Modify<ByTxHash>(it, [new_state](Announcement& ann){ ann.SetState(new_state); });
    }
    
    bool IsOnlyNonCompleted(Iter<ByTxHash> it)