Best bang for buck upgrade (Ryzen 5 Pro 3400G)

Current setup in a large Corsair case (self built in April 2021).

• Ryzen 5 Pro 3400G with onboard Radeon Vega Graphics

• ASUS TUF Gaming B450+PLUS II motherboard

• 32GB (4 x 8GB) Corsair VENGEANCE LPX DDR4 RAM 3200MHz

• Samsung 970 Evo 500GB SSD (110GB free)

• Windows 11 installed

• I love sitting with about 80 Chrome tabs open. :-)

• This is mainly an office / work from home machine, no gaming.

• Very occasional bit of Lightroom.

Task manager is showing 26GB of 30GB used (87%) (assume other 2GB is onboard GFX)

CPU only peaks around 30% when doing stuff in tabs

But the machine seems sluggish doing things in tabs, especially large footprints, like editing wordpress pages on sites. Definitely slower than some the other PC & Mac I use.

With the price of RAM so high, i'm wondering whether perhaps looking at a CPU upgrade would help? (any recommendations?)

Or do I need to bite the bullet and upgrade the whole thing?

Thank you.