There is plenty of evidence (rather than opinion) that with a decent compiler and hardware implementation the more complex addressing modes don't gain you anyth

There is plenty of evidence (rather than opinion) that with a decent compiler and hardware implementation the more complex addressing modes don't gain you anything worth the bother in either code size or performance. RISC-V is extensible. If someone really believes that more complex addressing modes are worth it then they can add them as a custom extension. If their chips work out to have better performance/price, performance/area, performance/energy then everyone else will want to copy them and those more complex addressing modes will become a standard extension for RISC-V. There is no sign of the RISC-V community (as opposed to ARM or x86 fans who aren't using RISC-V anyway) moving in that direction.