I cant give guarantee router gives performance and stability for five years. But with normal settings you can use for many years but security will be discarded.
Because the technology is developing every day. So updating of protocols and better speed, more powerfull may come in future say in next month might be.
Buying of new router is your decision in this regard.
Intel i5 7200U_ Nvidia 940MX _Windows_11_Enterprise_64bit_22H2_buildno_22621.754