The first silicon with the final ISA design (or at least RV32IMAC) was the FE310 which shipped on the HiFive1 in December 2016, less than five years ago.
It takes up to two years to go from RTL working in verilator or on an FPGA to manufactured chips on boards in shops.
RISC-V is all over the place in deep embedded. Samsung announced that their 2020 high end phones have RISC-V cores controlling the camera and also the 5G radio. Qualcomm is using RISC-V in their 5G. The very popular ESP32 series of WIFI/BT chips is switching to RISC-V, with the last three (?) models being either partially or fully RISC-V instead of Xtensa.
The last several months have seen announcements of startups who have chip designers from Intel, AMD, and Apple's M1 team and who are now working on *lake/Zen/M1-class RISC-V designs. Those will of course take maybe three or four years to appear on the market, but there is zero reason to think they won't be technically successful.