Depends on the sizing. If you have 6b free cash flow, spending 1b on scooping up ridiculously undervalued shares while keeping 5b for rainy days may be a good investment, also to send a signal about how you value your own trajectory.
People who have lived through past recessions tend to be quite risk-averse about capital adequacy. Despite the Tesla cash reserves that seem excessive to some, the prospect of major supplier disruption is very high, as is shipping instability. Because Tesla is also making major new investments that should not be deferred, it is simply foolhardy to assume all that cash flow will continue to accumulate unabated. Despite undervalued shares, doing a buyback does reduce cash irrevocably.
Think back only to 2008 as major banks went broke including the largest ones, so forced mergers provided cosmetic cover. Bank of America had a forced merger into Nations Bank. Merrill Lynch added to the new behemoth. The list goes on.
Many of us have serious myopia and assume Tesla is immune to the coming challenges. It is NOT. Luckily Tesla financial management has been very conservative so will be unlikely to answer the call to irresponsible liquidity reduction just when it might most be needed.
"...if you have 6b free cash flow..." is indeed the point. If developments in Europe and much of Asia flow exceptions...if the Ukraine war continues beyond the next six months... if trade tensions between China, the EU, the US are exacerbated... That wonderful free cash flow could quite quickly reduce.
Please, please don't pressure Tesla to reduce the cash cushion just as we are entering very challenging times. Were that to be done I would understand Tesla is abandoning the very prudence that has allowed the success we have seem. That would be one of the very few things that would make me sell all my shares.
I find it to be appalling that many of us are ignoring all the financial management discipline that has allowed Tesla to thrive. Paying back debt has been wise.
I've had to help liquidate too many major companies which followed such follies just as the good times stopped rolling. Those who want to do it should ignore those of us who have seen the perils first hand. Obviously you know better because you've never had to cope with disaster.
I apologize for my stridency. I do not apologize for the opinion.